Device for the transport of paper in printers, particularly dot

Details Device for the transport of paper in printers, particularly dot Device for the transport of paper in printers, particularly dot

1990-09-25

1993-02-09

Wiecking, David A.

Typewriting machines

Sheet or web

For feeding web record-medium

4006162, B41J 1100

Patent

active

051849054

ABSTRACT:
A paper transport device in printers (1), particularly in dot matrix printers, for the feeding of continuous webs (6) by transversely displaceable tractors (7, 8) which are arranged in pairs on the printer frame. The tractor pins (9) engage into the edge perforations of the continuous web (6) and the pin belts (10) are guided over at least one wheel (11) of the tractor (7, 8) and at least one driven tractor wheel (13) is present. The device is equipped with a locking device so that the tractor (7, 8) operating as push means or as pull means is mounted in each case on a drive shaft (14) and in each case prevented from turning on the printer fram (1a) by a projection (16) on the side (15a) opposite the drive shaft (14) or by a swingable tractor flap (24).

REFERENCES:
patent: 4032727 (1977-06-01), Burns, Jr.
patent: 4571103 (1986-02-01), Takeo et al.
patent: 4815877 (1989-03-01), Kikuchi et al.
patent: 4828157 (1989-05-01), Yokoi
patent: 4979837 (1990-12-01), Koike

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