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公开(公告)号：EP0172874B1
公开(公告)日：1988-05-11
申请号：EP85901120.7
申请日：1985-02-15
申请人： FACIT AKTIEBOLAG
IPC分类号： B41J11/30
CPC分类号： B41J11/30
摘要： Tractor mechanism for paper traction feed printers and typewriters, said mechanism including in a holder (2) an endless belt (8) which is mounted for movement in its endless direction, as well as a drive connection for the belt. The belt has external teeth (10) intended to drive a printing medium such as a paper web or the like through the printer on movement of the belt by engagement with a row of holes along an edge of the medium. The holed edge and the toothed belt run in a gap defined by two wall portions of the holder the height of the gap being less than the height of the teeth plus the thickness of the belt, and the wall portion facing towards the teeth has a groove (26) for the teeth. The holder (2) carries a printing medium insertion means with a feeder (32) which, from an extended printing medium engagement position, in which a hole engagement means (58) carried by the feeder is brought into engagement with a part of the row of holes in the printing medium intended for insertion in the gap, is movable together with the printing medium to a drawn-in position in which a plurality of holes in the row of holes are brought into engagement with teeth (10) in the gap. Moving means are disposed in connection with the drawn-in position to move the hole engagement means (58) out of engagement with the row of holes.
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2.发明授权
公开(公告)号：EP0226599B1
公开(公告)日：1990-02-07
申请号：EP86902934.8
申请日：1986-04-22
申请人： FACIT AKTIEBOLAG
CPC分类号： B41J33/26
摘要： A friction device, preferably for printer/typewriter ribbons, intended to provide engagement between a drive means (3) and a medium which is to be advanced by the drive means. A counter pressure roller (4) is arranged with a flexible shaft (8) which is mounted at a distance from the driving surface of the drive means (3) which is less than the radius of the counter pressure roller (4).
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