WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

D21G　CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES (winders or rewinders for finished products, means for adjustment of wrinkles or lateral extensions B65H)

D21G 1/00 Calenders (if restricted to the treatment of particular materials see the relevant class, e.g. B29C 43/24, D06); Smoothing apparatus

D21G 1/0006 ・{Driving arrangements}

D21G 1/0013 ・・{for controlled deflection rolls}

D21G 1/002 ・{Opening or closing mechanisms; Regulating the pressure}

D21G 1/0026 ・・{Arrangements for maintaining uniform nip conditions}

D21G 1/0033 ・・・{by offsetting the roll axes horizontally}

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}

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}

D21G 1/02 ・Rolls; Their bearings (in general F16C 13/00)

D21G 1/0206 ・・{Controlled deflection rolls}

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}

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}

D21G 1/0253 ・・{Heating or cooling the rolls; Regulating the temperature}

D21G 1/026 ・・・{using the hydraulic fluid in controlled deflection rolls}

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}

D21G 3/00 Doctors

D21G 3/005 ・{Doctor knifes}

D21G 3/02 ・for calenders

D21G 3/04 ・for drying cylinders

D21G 5/00 Safety devices

D21G 5/005 ・{for calenders}

D21G 7/00 Damping devices

D21G 9/00 Other accessories for paper-making machines

D21G 9/0009 ・{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}

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}

D21G 9/009 ・{Apparatus for glaze-coating paper webs}