Assembly comprising a plurality of thermal heads
US5943083A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 1997 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Dec 15, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/33575
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An assembly comprising a plurality of thermal heads (10), each thermal head comprising a linear array of resistor elements mounted on a flat substrate (17), and a drum (15) of diameter D mm for supporting a thermographic recording material, said thermal heads being mounted in a staggered fashion in at least two parallel rows (11,12) in which the linear arrays of resistor elements are parallel to one another, characterized in that: PA1 i) said resistor arrays of adjacent rows of thermal heads are separated by a spacing, d, greater than 0.2 mm; and PA1 ii) said substrates of thermal heads in adjacent rows (17', 17") include an angle .THETA. comprised between arc sine (d/2D) and arc sine (2d/D); and a direct thermal printing process therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.