Arrangement for guiding and shifting a carriage of an office machine
US4651229A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1985 |
| Grant date | Mar 17, 1987 |
| Priority date | — |
| Expiry date | Oct 15, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S74/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The carriage of a digital document reader is shifted by means of a pair of worms rotatable in the frame and engaging two nuts borne by the carriage. The worms are rotated simultaneously, e.g. by a single stepping motor and a toothed belt engaging a pulley or by two separate stepping motors. For the purpose of reducing inertia, each worm is formed together with the driving pulley by moulding a layer of plastics material on a metal core tube which is formed with a shallow groove of coarse pitch to anchor the plastics layer. Each nut, also of plastics material, is formed with a series of axial notches which define an equal number of elastic sectors which allow any play on the worm due to wear to be taken up.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.