Needle-carrying head for a printing machine
US4700625A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1985 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Oct 16, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/275
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A needle-carrying head for a printing machine has needles controlled by electro-magnets. The coils of the electro-magnets are soldered to pins carried by support ears for the coils. The pins pass through printed circuit boards to which they are soldered. The coils are engaged on cores constituted by limbs of respective fork-shaped members the second limb of which serves to complete the magnetic circuit. The two limbs of each fork-shaped member are interconnected by means of a transverse portion constituting a yoke, secured by setting into one or the other of two plates forming, with a central plate made of plastics material, a cage-shaped frame of the needle-carrying head. The printed circuit boards are thus interposed between the electro-magnets and the front plate of the frame on the one hand, and between the electro-magnets and the rear plate on the other hand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.