Latch mechanism for small-size printer
US5113759A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | May 4, 1990 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | May 4, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J7/48
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A latch mechanism for a small-size printer capable of performing a printing operation with a desired type on a rotatable type drum being held at a print position by impacting a hammer towards the type drum across a recording paper loaded therebetween. The latch mechanism comprises a group of type drums composed of type drums of three digits each comprising a lock groove wheel for fixing one type drum selected among three drums at a print position by one type selection operation; a group of lock levers movable between its initial non-print position and its print position, which is disposed so as to correspond to each of the type drums, and constantly biased by a lock lever spring toward the lock groove wheel to lock the type drum in a print position; and a group of lock lever holding means capable of actuating the lock lever by being attracted by an electromagnet. Thus, since the lock groove wheel of each type drum has a predetermined alignment, it is possible to select on desired type drum from a plurality of type drums by one type selection operation. By a repetition of this type selection operation, the types of plural digits can be selected by a single electromagnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.