Positioning device for sheet on exposure platen of a copying mac

Details Positioning device for sheet on exposure platen of a copying mac Positioning device for sheet on exposure platen of a copying mac

1986-11-05

1987-12-29

Wong, Peter S.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 75, 271246, 271236, G03G 1500

Patent

active

047164409

ABSTRACT:
A device for positioning an original in sheet form on the exposure platen of a copying machine, comprising abutment strips which extend parallel to each other at opposite sides of the platen and which are displaceable to and from each other for adjusting them to the width of an original fed between the strips on to the exposure platen. In front of each strip and displaceable therewith is at least one pair of rollers disposed with their axis parallel to the strips. A first roller of each pair being closer to the exposure platen and the associated strip than the other roller of that pair. A flexible belt for pressing an original on to the platen is trained between the platen and the said first rollers of each pair and about said first rollers and in opposite direction over said other rollers and then over the strips towards the frame of the device.
For positioning an original fed on to the platen flat against the platen, the first rollers are moveable in a direction perpendicular to the platen in order to press the flexible belt against the original to close to the abutment strips, irrespective of the width of the original.

REFERENCES:
patent: 3984098 (1976-10-01), Stange et al.
patent: 4592543 (1986-06-01), Tanimoto et al.
patent: 4645331 (1987-02-01), Berger

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