Inexpensive and reliable custom programmable phototypesetter
US4067022A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 26, 1976 |
| Grant date | Jan 3, 1978 |
| Priority date | — |
| Expiry date | Jan 26, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41B21/20
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A phototypesetter is disclosed having a stepping motor which actuates an escapement carriage coupled to an elongated carriage driving member. A projection lens carriage and a collimating lens carriage are selectively electromagnetically coupled to the elongated driving member, thereby to project images of varying character sizes through a focusing lens coupled to the escapement carriage, which sequentially projects focused character images across a photosensitive film on a line by line basis. A track select mirror is also selectively electromagnetically coupled to the elongated driving member for selectively projecting one of a plurality of tracks bearing characters of differing fonts carried by a rotatable font carrier element. A group of customized lens carriage positioning control codes and customized sizing codes, unique for each phototypesetter as a function of lens parameter variations, are stored within a size dictionary and a particular set, associated with the character size being typeset is read out of the dictionary and is employed to control the customized positioning of the lens carriages and image (film) positioning stepping motors. A novel technique is also disclosed…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.