Print ribbon cassette including ribbon tensioning means
US4605327A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1985 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Jul 23, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J33/52
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A print ribbon cassette of a simplified construction which can prevent slackening of a print ribbon and normally keep the print ribbon in taut condition for printing. The print ribbon cassette comprises a lock member having a locking position for preventing inadvertent rotation of a feed spool on which a print ribbon to be supplied is wound. The cassette further comprises a ribbon lock control member which is moved between an operative position and an inoperative position in response to a tensile force of a print ribbon applied thereto. In the operative position of the ribbon lock control member, it engages with the lock member and holds the same to the lock position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.