Paper tension adjusting device and method for a printer

Details Paper tension adjusting device and method for a printer Paper tension adjusting device and method for a printer

1989-09-11

1991-05-28

Burr, Edgar S.

Typewriting machines

Sheet or web

For feeding web record-medium

4006162, 226 20, 226 74, B41J 1130, B41J 1132

Patent

active

050188887

ABSTRACT:
A paper tension adjusting device in which one of the tractors with feeding pins changing feeding apertures in the paper is movable widthwise to adjust widthwise paper tension. The desired tension is determined from paper thickness which is in turn determined from the hammer flight time. Lengthwise tension is adjusted by adjusting paper clampers separated from the tractors. The tension is both widthwise and lengthwise directions is determined by optically sensing the positions of the feeding pin with respect to the aperture in which that pin is engaged.

REFERENCES:
patent: 3373288 (1968-03-01), Otepka et al.
patent: 3578138 (1971-05-01), Cantwell
patent: 4652153 (1987-03-01), Kotsuzumi
patent: 4848632 (1989-07-01), Mack et al.
patent: 4917512 (1990-04-01), Mimura et al.
IBM Technical Disclosure Bulletin, "Forms Tension Mechanism"; vol. 29, No. 3, Aug. 1986, pp. 1112-1113.
IBM Technical Disclosure Bulletin, "Optical Sensor Mount for Forms Tractor"; vol. 32, No. 2, Jul. 1989, pp. 1-4.

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