Printing – Selective or progressive – Bed and platen machines
Patent
1979-09-18
1981-12-29
Burr, Edgar S.
Printing
Selective or progressive
Bed and platen machines
101 9328, 101242, 101287, 271197, B41J 1308, B41J 1328
Patent
active
043076610
ABSTRACT:
To print on each of a number of sheets, the sheets are advanced, preferably in underlapped form, up to registering stops. When a sheet has been registered at the stops, suction is applied to an underlying conveyor, the stops are withdrawn and the sheet is advanced in steps to a printing station, the sheet being held in register by suction during this advancement. Printing takes place while the sheet is stationary and still held in register, between steps of movement. Suction may be switched on and off at the registering station by means of a movable perforated switch plate, the perforations of which are aligned, in a first position of the switch plate, with suction-conveying perforations in another plate or belt; in a second position of the switch plate its perforations are misaligned with the perforations in the other plate or belt, preventing the application of suction to an overlying sheet. A suction conveyor may also be used to convey a web from a first station at which an operation is performed thereon to a second station at which another operation is to be performed thereon in register with the first operation.
REFERENCES:
patent: 3194154 (1965-07-01), McKeag
patent: 3527166 (1970-09-01), Daffa
patent: 3644812 (1972-02-01), Bitto
patent: 3648605 (1972-03-01), Hottendorf
patent: 3812779 (1974-05-01), Cobb
patent: 4015523 (1977-04-01), Evans et al.
Billington Donald G.
Walker Roger
Wilkins David R. G.
Burr Edgar S.
McCorquodale Machine Systems Limited
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