Sheet feeding or delivering – Feeding – By means to convey sheet
Patent
1991-05-31
1992-11-17
Olszewski, Robert P.
Sheet feeding or delivering
Feeding
By means to convey sheet
271272, 400636, 346134, B65H 502
Patent
active
051636751
ABSTRACT:
A sheet feed mechanism for a plotter comprises a main drive roller, and a plurality of sub drive rollers which are serially arranged at predetermined spacings from the main drive roller. A main pinch roller is arranged in opposition to the main drive roller so as to be rotatable and movable over and axially of the main drive roller, and a sub pinch roller is arranged in opposition to the sub drive rollers so as to be rotatable and movable over and axially of the sub drive rollers. The axial length of the main drive roller is made greater than that of the main pinch roller. The side edges of a sheet are respectively held between the main drive roller and the main pinch roller and between one of the sub drive rollers and the sub pinch roller, and the main and drive rollers are synchronously rotated, thereby to feed the sheet in the lengthwise direction thereof. In case of feeding a broad sheet, the sub pinch roller is located so as to overlie the sub drive roller remoter from the main drive roller, and in case of feeding a narrow sheet, the sub pinch roller is located so as to overlie the sub drive roller closer to the main drive roller, whereupon one side edge of the sheet is held between the sub drive and pinch rollers.
REFERENCES:
patent: 3980295 (1976-09-01), Kleid
patent: 4205770 (1980-06-01), Wojdyla
patent: 4621802 (1986-11-01), Ishida et al.
Milef Boris
Mimaki Engineering Co., Ltd.
Olszewski Robert P.
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