Method and apparatus for controlling the sheet supply in a sheet

Details Method and apparatus for controlling the sheet supply in a sheet Method and apparatus for controlling the sheet supply in a sheet

1996-03-20

1997-12-23

Fisher, J. Reed

Printing

Rolling contact machines

Rotary

101484, 101148, B41F 2100

Patent

active

056997361

ABSTRACT:
A method and an apparatus for controlling the sheet supply in a sheet-processing printing machine, in particular a sheet-fed offset printing machine. In order that, at the beginning of printing, before which a specific process for predamping and/or preinking the plate and/or blanket cylinders takes place, a first sheet always runs into the printing zone precisely on completion of the process, provision is made for a first sheet to be conveyed by means of the engagement and renewed disengagement of the feeder into a predetermined position from which the number of machine revolutions up to reaching the first printing zone is known. The feeder is disconnected and the separator and pull suckers remain pressurized, thereby continuing to hold a sheet gripped. The process for predamping and/or preinking is then started, whereupon the reengagement of the feeder takes place precisely at that moment after which a first sheet then runs into the first printing zone precisely on completion of the process sequence.

REFERENCES:
patent: 3460473 (1969-08-01), Norton
patent: 3467007 (1969-09-01), Stotzer et al.
patent: 3683803 (1972-08-01), Gray et al.
patent: 5010820 (1991-04-01), Loffler
patent: 5081926 (1992-01-01), Rodi
patent: 5186105 (1993-02-01), Emrich et al.
patent: 5533448 (1996-07-01), Klingler

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