Means for self-positioning platen covers
US4097145A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1977 |
| Grant date | Jun 27, 1978 |
| Priority date | — |
| Expiry date | Jan 3, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/6228
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Self-positioning apparatus for a platen covering device is provided for a copier of the type which includes a platen, instrumentalities for flash illuminating a document placed by an operator on the platen, and a platen covering device such as a document feeder or a flat, opaque sheet of material or the like. The apparatus includes a linkage assembly for movably supporting the platen covering device; a manually releasable latch for holding the covering device at a predetermined position for holding respective documents of minimal thickness in contact with the platen; and resilient means including at least one torsion bar for urging the covering device away from said predetermined position, when said latch is released, for holding respective documents of greater thickness in contact with said platen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.