Device for controlling advance and return movements of original table of electrostatic copying apparatus
US4171901A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1977 |
| Grant date | Oct 23, 1979 |
| Priority date | — |
| Expiry date | Nov 14, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/6235
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for controlling advance and return movements of an original table of an electrostatic copying apparatus wherein the table is advanced in timed relationship with the movement of a photosensitive element and returned under the action of a spring to its initial position comprising a first shaft rotatable in timed relationship with the movement of said photosensitive element, a second shaft rotated at a predetermined speed in one direction, a stepped pulley mounted on said first shaft for free rotation relative thereto, a first pulley co-axially mounted on said first shaft through an one-way clutch operable when said first pulley rotates relative to said second shaft in said direction of rotation thereof, a first wire passing around said first pulley and which is connected at its one end to a smaller diameter portion of said stepped pulley and at the other end through a spring to said original table, a second wire passing around a larger diameter portion of said stepped pulley and connected at its opposite ends to said original table for movement therewith, ratchet means provided on said stepped pulley for pivotal movement under resilience, latch means operable to engage with …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.