Aperture-controlling device in a variable-scale photocopying machine
US4284347A · kind A · utility
0Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1980 |
| Grant date | Aug 18, 1981 |
| Priority date | — |
| Expiry date | Jan 3, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/041
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a variable-scale photocopying machine having a photosensitive medium, a light source, an optical system for projecting light from the source as an exposure light beam onto the medium, and a scale-varying mechanism, the width of the light beam is adjustable by an adjusting mechanism, which is actuated by a tensioned cord connected thereto when the cord is deflected by an adjusting member in response to movement of the scale-varying mechanism thereby to adjust the quantity of the exposure light to suit each scale of photocopying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.