Ink jet printer

Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

346 75, G01D 1518

Patent

active

044941242

ABSTRACT:
An ink jet printer having an ink supply tank and a constant volume fluid pump which pumps ink through a supply line to a print head and, during a start up sequence, to a pressurizing line having a fluid accumulator which rapidly increases the line pressure of the system until a predetermined ink pressure within the print head is reached. The pressure is sensed by a transducer adjacent the print head, and an outlet valve is actuated to close the flow of ink through the head abruptly, thereby creating a pressure wave which initiates ink flow through the orifices of the print head. In order to minimize contamination of ink in the supply line, the pressurizing line conveys ink back to the supply tank. The printer also includes an air system having a constant volume vacuum pump which is connected to draw air from the ink supply tank, thereby creating a vacuum within the tank, a pair of inlet lines connected to the vacuum pump inlet, each having a valve thereof which can be opened or closed to vary the amount of vacuum created within the tank by the supply pump, and an ink removal line which is connected to the ink supply line such that atmospheric air is drawn through the ink removal line, ink supply line and print head to the ink supply tank, thereby purging the print head of ink.

REFERENCES:
patent: 3661304 (1972-05-01), Martinez et al.
patent: 3761953 (1973-09-01), Helgeson et al.
patent: 3974508 (1976-08-01), Blumenthal
patent: 4038667 (1977-07-01), Hou et al.
patent: 4042937 (1977-08-01), Perry et al.
patent: 4240082 (1980-12-01), Yu
patent: 4314264 (1982-02-01), Bok et al.
patent: 4318114 (1982-03-01), Huliba
patent: 4336547 (1982-06-01), Matsumoto et al.
patent: 4399446 (1983-08-01), McCann et al.
patent: 4422080 (1983-12-01), Titcomb

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Ink jet printer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ink jet printer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ink jet printer will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1484034

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.