Density control for ink jet copier

Details Density control for ink jet copier Density control for ink jet copier

1977-03-03

1978-08-08

Cardillo, Jr., Raymond F.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358283, 358284, 358298, H04N 122, H04N 140

Patent

active

041060610

ABSTRACT:
An ink jet copier for copying a master includes an optical scanner which provides an output directly related to the tone of the master at successive points along a scan line on the master. An intergrator repetitively integratesthe output of the scanner and provides a first enabling print signal each time the integral of the scanner output reaches a predetermined level. The integrator resets each time this predetermined integral level is reached. A level detector also monitors the scanner output and provides a second enabling signal when the scanner output exceeds a predetermined level. A print control is responsive to the level detector and the integrator and provides a print control pulse train output upon receipt of either of the first or second enabling signals. An ink jet printer receives the print control output and deposits selected ink drops along a print line on the copy medium which corresponds to the scan line of the master.

REFERENCES:
patent: 1973725 (1934-09-01), Ranger
patent: 3197558 (1965-07-01), Ernst
patent: 3294896 (1966-12-01), Young
patent: 3482039 (1969-12-01), Valentin et al.
patent: 3580995 (1971-05-01), Klensch
patent: 3613103 (1971-10-01), Harris
patent: 3928718 (1975-12-01), Sagae et al.
patent: 3977007 (1976-08-01), Berry et al.
patent: 4001492 (1977-01-01), Suzuki et al.

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