Advancing material of indeterminate length – Means to engage longitudinally spaced modifications in material – Rotating sprocket
Patent
1984-07-02
1986-11-11
Hornsby, Harvey C.
Advancing material of indeterminate length
Means to engage longitudinally spaced modifications in material
Rotating sprocket
226186, 226188, 226192, 226195, B65H 2002, B65H 2020, B65H 2040, B65H 2314
Patent
active
046217568
ABSTRACT:
A printer includes a print mechanism for performing printing operations and a print medium feeding mechanism for feeding a print medium past the print mechanism so that printing operations can be performed on the print medium. The print medium feeding mechanism includes a forward feed apparatus located downstream of the print mechanism for feeding the print medium in the forward direction past the print mechanism and a print medium tensioning apparatus. The tensioning apparatus includes at least one pair of pressure wheels rotatably mounted on the frame and located on opposite sides of a print medium being fed by the forward feed apparatus and means for restricting the rotation of at least one of the pressure wheels, whereby the pressure wheels exert a retarding force on the print medium tending to tension the print medium. Each pressure wheel is constructed so that it is flexible in the axial direction so as to permit lateral movement of a print medium as it passes between the pair of pressure wheels.
The print medium feeding mechanism also includes drive means for rotating at least one of the pressure wheels in the reverse direction so as to provide for reverse feed of the print medium. This drive means is coupled through a one way coupling so as not to affect the ability of the pressure wheel to rotate during forward feed of the print medium.
REFERENCES:
patent: 3180548 (1965-04-01), Stafford
patent: 3285484 (1966-11-01), Johnson
patent: 3326156 (1967-06-01), Cobble, Sr. et al.
patent: 3420158 (1969-01-01), Kobiella
patent: 3586149 (1971-06-01), Miller
patent: 3659797 (1972-05-01), Coy
patent: 3800992 (1974-04-01), Yamagishi
patent: 3980207 (1976-09-01), Maccaferri
patent: 4221480 (1980-09-01), Spehrley, Jr.
patent: 4389009 (1983-06-01), Yamashita
patent: 4428284 (1984-01-01), Thorne
IBM Technical Disclosure Bulletin, vol. 22, No. 7, pp. 2616-2617, Dec. 1979.
Bullock Michael K.
Hedrick Dennis R.
James, III Edmund H.
Marvin Richard H.
Haugland Scott J.
Hornsby Harvey C.
International Business Machines - Corporation
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