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PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE (devices for topping or skinning onions or flower bulbs A23N 15/08)
Definition statement
This subclass/group covers:

The scope of this subclass is composed of five separate parts, relating to the five parts of the subclass title. For ease of reference each section of these definitions is separated under five corresponding simplified headings: "Threshing", "Baling", "Bundling", "Cutting" and "Storing".

Threshing (relating to main groups A01F 5/00-A01F 12/00 and A01F 17/00-A01F 21/00):

Methods and apparatus for separating grains or seeds from harvested plants or plant parts by mechanical action.

Baling (relating to main groups A01F 13/00-A01F 21/00):

Methods and apparatus for forming bales of straw, hay or like harvested products of plant origin.

Bundling (relating to main group A01F 1/00):

Stationary apparatus or hand tools for forming or binding bundles of straw, hay or like harvested products of plant origin.

Cutting (relating to main groups A01F 3/00 and A01F 29/00):

Apparatus specially adapted for cutting or disintegrating straw, hay or like already harvested products of plant origin.

Storing (relating to main group A01F 25/00):

Mechanical aspects (e.g. material handling aspects) of apparatus (e.g. silos) or methods that are specially adapted for storing harvested agricultural or horticultural crops.

Relationship between large subject matter areas

Threshing

Main groups A01F 5/00-A01F 12/00 and A01F 17/00-A01F 21/00 provide for threshing devices and for accessories that are directly connected with threshing. Combines, and details of combines that are not directly connected with the threshing action (e.g. mowing, feeding or vehicular features) are covered by A01D.

Baling

Main groups A01F 13/00-A01F 21/00 are application-oriented places for methods or apparatus for baling that are specially adapted for straw, hay or like harvested products of plant origin. Baling of compressible fibrous material in general is provided for in B65B 27/12. Baling presses in general is provided for in B30B 9/30. Bales of material are provided for in B65D 71/00.

Bundling

Main group A01F 1/00 is an application-oriented place for stationary apparatus or hand tools for bundling, which are specially adapted for straw, hay or like harvested products of plant origin. Binding of harvested products by mobile apparatus in the field is provided for in A01D, for example in A01D 37/00, A01D 39/00 and A01D 59/00. Bundling of compressible fibrous material in general is provided for in B65B 27/12. Bundling of articles in general is provided for in B65B 13/00.

Cutting

Main groups A01F 3/00 and A01F 29/00 are application-oriented places for apparatus or methods that are specially adapted for cutting up or disintegrating straw, hay or like already harvested products of plant origin. Mowing and other cutting down of standing plants is covered by A01D and A01G. Cutting in general is covered by B26. Disintegrating in general, e.g. by rotating knives, is covered by B02C.

Storing

Main group A01F 25/00 is an application-oriented place for mechanical aspects (e.g. material handling aspects) of apparatus or methods that are specially adapted for storing harvested agricultural or horticultural crops. Containers for storage of articles or materials in general is covered by B65D. Storing and associated handling of bulk material or articles in general is covered by B65G. Civil-engineering aspects of silos or similar bulk storage containers are covered by section E, for example E04H 7/00.

References relevant to classification in this subclass
This subclass/group does not cover:

Threshing

Separation of grains or seeds from plants in the place where they grow
Combines with thresh before the stalk is cut, Harvesting of standing crops, Picking of fruits
Combines
Field threshers with windrow pick-up apparatus
Pick-ups for harvested crop
Coring or stoning of fruit
Removing seed-containing sections from fruit
Hulling, husking or cracking of nuts

Baling

Arrangements for making or setting stacks
Pick-ups for harvested crop

Bundling

Arrangements for making or setting stacks in connection with harvesting

Cutting

Cutting or disintegrating in combination with mowing
Pick-ups for harvested crop
Shredding tea leaves
Fodder mashers for preparing animal feeding-stuff
Cutting tobacco
Spice mills

Storing

Arrangements for making or setting stacks, used in connection with harvesting
Devices for preserving flowers
Arrangements in barns for treatment of tobacco
Suspending devices for tobacco leaves
Cabinets for perishable goods
Fruit or potato storage cabinets, racks or tray for domestic use
Closed containers for foodstuffs
Drying or storing hops
Civil engineering aspects of bulk storage containers, e.g. silos

Examples of places where the subject matter of this class is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Baling

Vehicles for carrying harvested crops with bale-forming means additionally used for loading
Packing or pressing tobacco

Bundling

Apparatus for binding bouquets or wreaths of flowers
Packing or pressing tobacco
Informative references
Attention is drawn to the following places, which may be of interest for search:

Threshing

Separating solids using pneumatic tables or jigs
Separating solids from solids by dry methods, in general
Hulling, husking, decorticating or removing awns otherwise than in connection with threshing
Conveying in general

Baling

Forming of bundles of straw, hay or like material of plant origin
Loaders for bales
Baling of compressible fibrous material in general
Baling presses in general
Bales of material
Conveying in general

Bundling

Mobile binders for use while harvesting
Loaders for sheaves
Forming of bales
Bundling of compressible fibrous material in general
Bundling of articles in general

Cutting

Mowing
Cutting implements specially adapted for horticultural purposes, e.g. flower shears, fruit shears, secateurs or hedge shears
Apparatus for destruction of unwanted vegetation
Household implements for mashing potatoes or other foodstuff
Disintegrating in general
Hand-held cutting tools
Cutting in general
Conveying in general

Storing

Protecting growing plants
Preservation of plants or parts thereof
Preserving flour by storage in an inert atmosphere
Preservation of fruits or vegetables
Preservation of edible seeds
Preservation of edible oils or fat
Preservation of materials to produce animal feeding stuff
Preservation of foods or foodstuffs in general
Containers for storage of articles or materials in general
Storage and associated handling of bulk material or articles in general
Conserving hops
Refrigerators, cold rooms, or the like
Drying in general
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Bale (noun)
A compressed, solid package of harvested material, which is either held together by thread or webs or formed by the material itself (with or without additives) to maintain its shape.
Bundle (noun)
A relatively loose package of harvested material, normally consisting of straws or stalks that are oriented in parallel to each other. It can either be held together by thread or webs or be formed by the material itself.
Combine (noun)
Harvester or mower combined with a threshing device.
Harvest (verb)
Separate useful parts from growing plants in situ, mow plants, or gather whole plants or their useful parts from the ground or from where the plants grow, with the intention to make use of the separated, mown or gathered plantmaterial.
Mow (verb)
Cut down grass, cereals or other standing plants.
Threshing
Separation of grains or seeds from harvested plants or plant parts (e.g. cereals, maize/corn, peas, beans or pine cones) by mechanical action (e.g. shaking, stamping, rubbing, beating or applying intermittent pressure).
Stationary apparatus or hand tools for forming or binding straw, hay or the like into bundles (baling apparatus or presses A01F 13/00, A01F 15/00; mobile binders for use in the field A01D 37/00, A01D 39/00)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Baling apparatus or presses
Mobile binder for use on the field
Hand-operated implements for cutting-up straw, hay or the like (mechanically-driven straw cutters A01F 29/00; cutting in general B26)
Definition statement
This subclass/group covers:

As the title describes, documents concerning devices which are hand-operated (i.e. by hand) to cut straw, hay or the like should be classified here.

Illustrated example of subject matter classified in A01F 3/00

Example from US1427733 by Antonio Groff

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Mechanically-driven straw cutter
Cutting in general
Threshing apparatus
References relevant to classification in this subclass/group
This subclass/group does not cover:
Hand operated threshing implements
with axles in line with the feeding direction; { Axial threshing machines}
Informative references
Attention is drawn to the following places, which may be of interest for search:
Threshing devices
Parts or details of threshing apparatus (devices, other than safety devices for feeders, for protecting human beings A01D 75/20, A01F 21/00)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Devices for protecting human beings
A01F75/20, A01F 21/00
Special rules of classification within this group

Any document including canvas or tray to be put on the ground to measure loss of grain must be classified/searched here.

Straw separators {, i.e. straw walkers, for separating residual grain from the straw (grain cleaning A01F 12/44) }
Informative references
Attention is drawn to the following places, which may be of interest for search:
Grain cleaning
with shaker screens or sieves
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Screens or sieves
On the walker.
Arrangements of straw crushers or cutters
Informative references
Attention is drawn to the following places, which may be of interest for search:
Cutting apparatus specially adapted for cutting hay, straw or the like
Apparatus for removing awns from the grain
Informative references
Attention is drawn to the following places, which may be of interest for search:
Decorticating or removing awns otherwise than in threshing machines
Air conduits or blowers for grain
Informative references
Attention is drawn to the following places, which may be of interest for search:
For conveying through pipes or tubes in general
Sack-filling devices; Counting or weighing devices
Informative references
Attention is drawn to the following places, which may be of interest for search:
Packaging in bags
Weighting apparatus in general
Counting mechanisms in general
Hand-operated baling apparatus
Definition statement
This subclass/group covers:

As the title describes, documents concerning devices which are hand-operated (i.e. by hand) to bale straw, hay or the like should be classified here.

Baling presses for straw, hay or the like { making compressed stacks A01D 85/00}
Definition statement
This subclass/group covers:

Presses (i.e. machines which are not hand-operated) capable of producing a bale (material on which a substantial compression has been carried out).

Informative references
Attention is drawn to the following places, which may be of interest for search:
Pick-up for balers
Making compressed stacks
Pressing in general
{for conditioning bales, e.g. rebaling}
Definition statement
This subclass/group covers:

Reducing the size of a bale by re-compressing it after it has been formed a first time.

with press-boxes { (A01F 15/046 takes precedence) }
Definition statement
This subclass/group covers:

Devices in which the product is introduced in a box in order to produce a bale, but without compression means which compress the material after its introduction in the box (e.g. rams, compression belts, etc)

Illustrated example of subject matter classified in A01F 15/02

Example from US5193449 by Ransom Woodbury S.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Plunger presses with press-boxes
Plunger presses
Definition statement
This subclass/group covers:

Illustrated example of subject matter classified in A01F 15/04

Example from US4782651 by Hay and Forage Corp.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Presses using a pressing ram
Special rules of classification within this group

If the documents classified in this group (or subgroups) comprise anti-return means, then they must be also indexed in the group A01F 2015/048

with double-action plunger
Definition statement
This subclass/group covers:

Baling devices comprising a plunger which compresses material when moving in either direction.

Illustrated example of subject matter classified in A01F 15/06

Example from FR1381197 by Sperry Rand Corp.

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Rotobalers, i.e. machines for forming cylindrical bales by winding and pressing
Definition statement
This subclass/group covers:

The construction of the rotobaler for the purpose of winding the material in order to form a cylindrical bale. Typically they also bind or wrap the bale once finished, but those aspects are dealt with in other subgroups, in the same way as some other particular aspects of the construction not directily related to the configuration of the baling chamber (e.g drives, feeding devices, etc).

Illustrated example of subject matter classified in A01F 15/07

Example from EP2269440 by CNH Belgium NV

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Pressing in general by means other than rams
Crop pelleting or briquetting
Special rules of classification within this group

Some special aspects of the documents classified in this group must be also indexed (if applicable) in the groups A01F 2015/077 (chamber formed by belts and rollers), A01F 2015/0775 (fix volume chambers), A01F 2015/078 (chamber delimited only by flexible elements), A01F 2015/0785 (locking means for the chamber), A01F 2015/079 (rollers' sledge) and A01F 2015/0795 (variable volume chambers)

{Arrangements for continuous operation}
Definition statement
This subclass/group covers:

Rotobalers which do not need to stop after having finished a bale before starting a new one.

Example from EP1264532 by Deere&Co.

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{Wrapping devices (tying devices A01F 15/141) }
Definition statement
This subclass/group covers:

This group includes wrappers which travel around static bale on a wrapping table or similar.

Example from EP2123145 by Idough Invest Company.

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References relevant to classification in this subclass
This subclass/group does not cover:
Wrappers for groups of bales
Machinery for making sausage-like groups of bales by wrapping or bagging
Informative references
Attention is drawn to the following places, which may be of interest for search:
Tying devices for bales
Wrapping of cylindrical objects
Special rules of classification within this group

All devices for wrapping bales individually (including square bales) must be classified here, even if they are not integrated in a baler.

Wrapping requires covering, but not necessarily covering 100% of bale surface.

Some special aspects of the documents classified in this group must be also indexed (if applicable) in the groups A01F 2015/0725 (film dispensers), A01F 2015/073 (rotating arms), A01F 2015/0735 (combinations of bale press and wrapper), A01F 2015/074 (discharge), A01F 2015/0745 (wrapping material), A01F 2015/075 (wrapping with open baling chamber), A01F 2015/0755 (wrapping table), and A01F 2015/076 (sensors)

{Wrapping the bale in the press chamber before opening said chamber}
Definition statement
This subclass/group covers:

Illustrated example of subject matter classified in A01F 15/0715

Example from EP1707046 by Deere&Co.

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Special rules of classification within this group

If the documents classified in this group include braking means for the film, then they must be also indexed in the group A01F 2015/072 . If they include sensors, then they must also be indexed in the group A01F 2015/076

Details
Definition statement
This subclass/group covers:

This head group should only be used for details which do not have a proper group available under the subgroups of this class, and which do not relate to the general principle behind the previous head groups (A01F 15/005, A01F 15/02, etc), but to details of such devices which could be applicable to different types of presses (plunger presses, rotobalers, etc). E.g. a counter of bales mounted on a square baler and based on an image-processing system which detects the bale once dropped on the field.

Special rules of classification within this group

If the documents classified in this group (or subgroups) include an inclinometer, they must be also indexed in the group A01F 2015/0808

{Regulating or controlling density or shape of the bale}
Definition statement
This subclass/group covers:

Devices which regulate or control density or shape of a bale which is being produced in a baler.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Extrusion chambers with adjustable outlet opening
{for the tying devices or needles}
Special rules of classification within this group

If the documents classified in this group include a clu tch for the knotter and/or a bale-length measuring device, then they must be also indexed in the group A01F 2015/0866

{Discharge devices}
Definition statement
This subclass/group covers:

Devices to discharge a bale from a baler.

Platforms and the like to discharge the bale from the baler onto the field.

Example from EP1935232 by CNH Belgium NV.

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Special rules of classification within this group

If the documents classified in this group (or subgroup) comprises a bale weighing device, then they must be also indexed in the group A01F 2015/0891

Feeding devices for the crop material, {e.g. precompression devices (pick-ups A01D 89/00) }
Definition statement
This subclass/group covers:

Pick-ups, feeding rollers, conveyors, cutters, etc particularly adapted for feeding material to balers.

Example from EP1562739 by AGCO Corp.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Loaders for loading wagons
Pick-ups
Special rules of classification within this group

Some special aspects of the documents classified in this group must be also indexed (if applicable) in the groups A01F 2015/107 (withdrawing knives, rotors, walls), and A01F 2015/108 (cutter and counter-cutter)

{Feeding at right angles to the compression stroke (A01F 15/106 takes precedence) }
Definition statement
This subclass/group covers:

The feeder which introduces material directly into the pressing chamber at right angle to the compression stroke.

Example from EP1769674 by Usines Class France SAS.

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References relevant to classification in this subclass/group
This subclass/group does not cover:
Feeding devices for round balers takes precedence
Special rules of classification within this group

Some special aspects of the documents classified in this group must be also indexed (if applicable) in the groups A01F 2015/102 (bottom feeding), A01F 2015/103 (side feeding), and A01F 2015/105 (top feeding)

Feeding devices for the ties
Definition statement
This subclass/group covers:

Device for feeding ties in a baler.

E.g. container of twine, tensioning mechanisms at the delivery point of twine, guiding devices.

Example from EP1234495 by Lely Machinenfabrik GmbH.

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Tying devices specially adapted for baling presses { independent binders A01D 39/00}
Definition statement
This subclass/group covers:

Devices for tying bales once finished

Includes devices for connecting the ends of binding material around the bale (even if ends are only produced after the material has been cut in order to eject the tied bale).

Example from EP464651 by Greenland GmbH&Co KG.

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References relevant to classification in this group
This subclass/group does not cover:
Feeding mechanisms for the ties
Needles, knotters
Devices for displacing twine around a round bale
Informative references
Attention is drawn to the following places, which may be of interest for search:
Equipment for binding harvested or mown produce
Independent binders
Drives for the tying devices or needles
{for round balers (wrapping devices A01F 15/071) }
Informative references
Attention is drawn to the following places, which may be of interest for search:
Wrapping devices
Special rules of classification within this group

If the documents classified in this group comprise guiding fingers for the twine, then they must be also indexed in the group A01F 15/141

Division blocks
Definition statement
This subclass/group covers:

Blocks which separate consecutive bales inside a baler.

Example from FR458020 by Louis Francois Simon.

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Endless belts, rolls or the like
Definition statement
This subclass/group covers:

Endless belts, rolls or the like elements which are used to delimit a pressing chamber in a rotobaler.

Special rules of classification within this group

Some special aspects of the documents classified in this group must be also indexed (if applicable) in the groups A01F 2015/183 (belts), and A01F 2015/186 (rollers and their bearings)

Straw conveyers for threshing machines or baling presses
Definition statement
This subclass/group covers:

Conveyors for transporting straw along relatively long distances in order to reach the thresher or baler. E.g. to cover the distance between two machines, or two parts of the machine.

Example from DE1026230 by Arnold Spethmann.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Feeding devices for balers
Conveyors in general
Devices for securing threshing machines or baling presses to the ground, e.g. for compensating for unevenness of the ground
Definition statement
This subclass/group covers:

Bases for threshing machines and balers in order to work in a fixed position on the field, and also levelling devices for ensuring a certain orientation with regards to horizontal.

Example from FR412731 by Gaston Lebled Amilhat.

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Devices for protecting human beings for threshing machines or baling presses (in combines A01D 75/20; for feeders for threshing apparatus A01F 12/16)
Definition statement
This subclass/group covers:

Devices intended to protect human beings from any risk, including noise protection.

References relevant to classification in this group
This subclass/group does not cover:
Not for safety devices for feeders for threshing apparatus
Informative references
Attention is drawn to the following places, which may be of interest for search:
Safety devices for feeders for threshing apparatus
Safety devices in combines
Safety devices in general
Special rules of classification within this subclass/group

An application disclosing a baler with a housing surrounding the mechanisms should not be classified here since all balers comprise a housing. Unless the application discloses a new housing which is intended to increase safety according to it (e.g. covering an area which until then was never covered).

Storing agricultural or horticultural produce; Hanging-up harvested fruit (maturing fruit A23N 15/06; arrangements in barns for preparatory treatment of tobacco A24B 1/02; packing or storing hops C12C 3/04)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Preservation of plants
Preservation of vegetable or fruit
Maturing fruit
Arrangements in barns for preparatory treatment of tobacco
Storing bulk material in general
Packing or storing hops
Silos built by civil engineering techniques
Drying in general
Special rules of classification within this group

This group concerns the construction of “basic” or "mechanical" storage places, without artificial refrigeration and without complex chemical preservation.

Not for the chemical aspects of fruit storage which go beyond a simple drying in racks, or beyond ventilation of stacks or silos.

Clamps; Pits
Definition statement
This subclass/group covers:

A clamp is characterised by being covered with earth, so it may be "above ground level" but would still be "underground" by definition. It might be for other products than potatoes.

Example from US1629392 by Ballard Killion James

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Stacks, ricks or the like
Definition statement
This subclass/group covers:

All stacks of loose material (i.e. not stacks from bales)

Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangements for making or setting stacks
{Distributing arrangements in haystacks}
Definition statement
This subclass/group covers:

Devices for distributing product when creating a haystack.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Distributing arrangements for forage silos
Ventilating means
Informative references
Attention is drawn to the following places, which may be of interest for search:
Ventilating arrangements for forage silos
Drying solids in general
{Transport devices for hay racks}
Definition statement
This subclass/group covers:

All devices for transporting hay racks, including hay racks having means for changing its location and apparatuses for handling hay racks, should be classified in this group.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Loaders for sheaves and stacks
Coverings (A01F 25/14 takes precedence)
Definition statement
This subclass/group covers:

Devices for covering harvested produce on one or more sides, but not completely surrounding it. Also for bales which are covered just on the top side.

Example from US2006010783 by Evans Timothy D.

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References relevant to classification in this group
This subclass/group does not cover:
Containers which completely surround the harvested produce
Informative references
Attention is drawn to the following places, which may be of interest for search:
Protective coverings for plants
Containers specially adapted for storing takes precedence
Containers specially adapted for storing
Definition statement
This subclass/group covers:

Containers completely surrounding and enclosing the product, in loose or baled form. E.g. baggers. Wrappers or baggers for groups of bales.

Example 1 from EP1826150 by Tabstar LTD T A Silasock R&D.

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Example 2 from US6748724 by SRC Innovations LLC.

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References relevant to classification in this subclass
This subclass/group does not cover:
Wrappers for individual bales
Informative references
Attention is drawn to the following places, which may be of interest for search:
Wrapping bales
Construction of containers for fluent solids, e.g. silos
Special rules of classification within this group

Some special aspects of the documents classified in this group must be also indexed (if applicable) in the groups A01F 2025/142 (for groups of bales), A01F 2025/145 (baggers for loose material), A01F 2025/147 (under vacuum)

Arrangements in forage silos
Definition statement
This subclass/group covers:

Silos for forage which are made in the ground or above it in order to preserve said forage for future feeding or bedding of cattle.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Loading or unloading arrangements in general
Construction of containers for fluent solids, e.g. silos
{in trench silos}
Definition statement
This subclass/group covers:

Silos which are built as a trench in the ground, or between two longitudinal walls above ground level.

Example from EP1166618 by Gilbert Duhamel.

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{Loading arrangements}
Definition statement
This subclass/group covers:

Loading any kind of forage silos, including bags of forage.

Example 1 from US2002168253 by Musser Kenneth D.

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Example 2 from US2005097868 by Miller ST Nazianz Inc.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
{Distributing arrangements (for haystacks A01F 25/045) }
Definition statement
This subclass/group covers:

Devices for distributing product when loading a forage silo.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Distributing arrangements for haystacks
{for trench silos}
Definition statement
This subclass/group covers:

Illustrated example of subject matter classified in A01F 25/2027

Example from FR2776164 by Mailleux SA

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Special rules of classification within this group

Some special aspects of the documents classified in this group must be also indexed (if applicable) in the groups A01F 2025/2045 (transferring conveyor), A01F 2025/2054 (cutting layers), A01F 2025/2063 (shredding layers), A01F 2025/2072 (scoops), A01F 2025/2081 (hydraulics), and A01F 2025/209 (manual tools)

{Cutting or handling arrangements for silage blocks}
Definition statement
This subclass/group covers:

Cutting a complete block out of the forage silo and/or handling such block.

Example from EP087588 by Busatis Werke KG.

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Informative references
Attention is drawn to the following places, which may be of interest for search:
Apparatus for handling round bales
Forks for loads
Forks with side clamps
Ventilating arrangements
Definition statement
This subclass/group covers:

Devices for ventilating product which is stored in forage silos.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Ventilating means for stacks
Drying solids in general
Cutting apparatus specially adapted for cutting hay, straw or the like (mowers combined with means for cutting up the mown crop A01D 43/08)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Mowers combined with means for cutting up mown crop
Cutting machines in general
{for disintegrating and cutting up bales of hay, straw or fodder (for unrolling round bales A01D 87/127) }
Informative references
Attention is drawn to the following places, which may be of interest for search:
For unrolling round bales
This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013