Hammer support for rotary printing apparatus
US4236842A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1978 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Aug 3, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J9/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A printing apparatus which includes a support for paper and a plurality of printing dies for making impressions on the paper. A reciprocally driven hammer is employed for causing the dies to form the impressions, and the hammer is supported by spring arms which are, in turn, attached to a fixture. This fixture includes an opening freely receiving the hammer whereby the hammer is movable without contact with the fixture. A portion of each spring arm is attached to the hammer at forward and rearward locations, and other portions extend outwardly of the hammer axis whereby the hammer is stabilized at all times. The spring action normally biases the hammer away from the dies, and drive force is imparted in opposition to the spring force as by an electrical coil attached to the hammer and situated within a magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.