Printing – Rolling contact machines – Rotary
Patent
1975-08-01
1977-01-25
Burr, Edgar S.
Printing
Rolling contact machines
Rotary
331845, 101248, 101DIG12, B41F 1700, B41F 1316, B41F 1344
Patent
active
040045099
ABSTRACT:
A mounting-proofing machine to facilitate mounting of flexible printing plates on a plate cylinder preparatory to operation in a flexographic printing press and to obtain proofs from these plates, whereby the mounted plates may be checked for color registration and other factors. The machine includes a proofing cylinder cantilevered from and rotatable on the free end of a swing arm adapted to transfer the proofing cylinder from a forward-position proofing state in which it makes contact with the surface of a plate cylinder that has been elevated in a vertical plane intersecting the axes of rotation of both cylinders to effect such engagement, to a rear-position mounting state displaced from this plane. In the mounting state, an optical viewer adapted to observe the surfaces of both cylinders in superposed relation is brought into an operative position which is intersected by the vertical plane. In the course of its swing, the proofing cylinder is caused to undergo an angular displacement to an extent whereby a point printed on the proofing cylinder in the proofing state and corresponding to a contact point on the plate cylinder is phase-shifted to assume an observation position in the mounting state which, in the optical viewer, appears to be coincident with the contact point.
REFERENCES:
patent: 2539965 (1951-01-01), Moss et al.
patent: 3057292 (1962-10-01), Larsen
patent: 3186336 (1965-06-01), Kirby
patent: 3331318 (1967-07-01), Augnstyn et al.
patent: 3361060 (1968-01-01), Hoexter et al.
patent: 3390633 (1968-07-01), Boughton
patent: 3398633 (1968-08-01), Raivio
patent: 3679316 (1972-07-01), Boujon
Burr Edgar S.
Mosstype Corporation
Pieprz William
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