Ink jet recording apparatus and pump mechanism for use therewith
US5357275A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1993 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Dec 30, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/16523
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A pump mechanism of an ink jet recording apparatus comprises a pump having a suction portion for sucking from a sucked member, said pump switching between the suction and non-suction operation of the suction portion by a reciprocating motion of a piston within a cylinder, without having a valve, a carrying member connected to said pump for carrying waste ink from said pump said carrying member opening to the atmosphere and a prevention mechanism for preventing a backflow of ink within said pump from the suction portion of said pump, to the outside of said pump which is caused by the reciprocating motion of the piston said prevention mechanism being an internal pump mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.