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Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES (winders or rewinders for finished products, means for adjustment of wrinkles or lateral extensions B65H)
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D21G 1/00
Calenders (if restricted to the treatment of particular materials see the relevant class, e.g. B29C 43/24, D06); Smoothing apparatus
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D21G 1/0006
.
{
Driving arrangements
}
D21G 1/0013
. .
{
for controlled deflection rolls
}
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D21G 1/002
.
{
Opening or closing mechanisms; Regulating the pressure
}
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D21G 1/0026
. .
{
Arrangements for maintaining uniform nip conditions
}
D21G 1/0033
. . .
{
by offsetting the roll axes horizontally
}
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D21G 1/004
. .
{
Regulating the pressure
}
D21G 1/0046
. . .
{
depending on the measured properties of the calendered web
}
D21G 1/0053
. . .
{
using magnetic forces
}
D21G 1/006
.
{
with extended nips
}
D21G 1/0066
.
{
using a special calendering belt
}
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D21G 1/0073
.
{
Accessories for calenders
}
D21G 1/008
. .
{
Vibration-preventing or -eliminating devices
}
D21G 1/0086
. .
{
Web feeding or guiding devices
}
D21G 1/0093
. .
{
Web conditioning devices
}
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D21G 1/02
.
Rolls; Their bearings (in general F16C 13/00)
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D21G 1/0206
. .
{
Controlled deflection rolls
}
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D21G 1/0213
. . .
{
with deflection compensation means acting between the roller shell and its supporting member
}
D21G 1/022
. . . .
{
the means using fluid pressure
}
D21G 1/0226
. .
{
Bearings
}
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D21G 1/0233
. .
{
Soft rolls
}
D21G 1/024
. . .
{
formed from a plurality of compacted disc elements or from a spirally-wound band
}
D21G 1/0246
. .
{
Hard rolls
}
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D21G 1/0253
. .
{
Heating or cooling the rolls; Regulating the temperature
}
D21G 1/026
. . .
{
using the hydraulic fluid in controlled deflection rolls
}
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D21G 1/0266
. . .
{
using a heat-transfer fluid (D21G 1/026 takes precedence)
}
D21G 1/0273
. . . .
{
on the exterior surface of the rolls
}
D21G 1/028
. . .
{
using electrical means
}
D21G 1/0286
. . .
{
Regulating the axial or circumferential temperature profile of the roll
}
D21G 1/0293
. .
{
Provisions or constructions to facilitate the removal of the rolls
}
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Doctors
D21G 3/005
.
{
Doctor knifes
}
D21G 3/02
.
for calenders
D21G 3/04
.
for drying cylinders
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D21G 5/00
Safety devices
D21G 5/005
.
{
for calenders
}
Damping devices
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Other accessories for paper-making machines
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.
{
Paper-making control systems
}
D21G 9/0018
. .
{
controlling the stock preparation
}
D21G 9/0027
. .
{
controlling the forming section
}
D21G 9/0036
. .
{
controlling the press or drying section
}
D21G 9/0045
. .
{
controlling the calendering or finishing
}
D21G 9/0054
. .
{
details of algorithms or programs
}
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D21G 9/0063
.
{
Devices for threading a web tail through a paper-making machine
}
D21G 9/0072
. .
{
using at least one rope
}
D21G 9/0081
.
{
Apparatus for removing samples from travelling web material
}
.
{
Apparatus for glaze-coating paper webs
}
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013