Doubly articulated screen printing apparatus with on-line regist

Details Doubly articulated screen printing apparatus with on-line regist Doubly articulated screen printing apparatus with on-line regist

1994-01-03

1995-08-29

Burr, Edgar S.

Printing

Stenciling

Stencils

101115, 101DIG36, B41F 1536

Patent

active

054450756

ABSTRACT:
A screen printing apparatus includes a plurality of novel printing mechanisms, one each at the outer end of a radially disposed support arm having a first, elbow joint and attached at the inner end of the arm to a vertically disposed, rotatable hub. Each printing mechanism includes a screen frame clamp pivotably mounted at a second, vertically pivotable wrist joint to a base section, allowing pivotability of a screen held in the clamp. The base section has attached at an outer end thereof an alignment bar having a plurality of upwardly protruding registration pins. A transparent calibration plate has holes therethrough adapted to insertably receive the registration pins, in an overlying relationship to an object to be printed on a platen beneath the calibration plate. A yoke plate attachable at an adjustable height and radial distance to the support arm supports the base section at a releasably clampable position adjustable in a horizontal plane relative to an object to be printed, thereby allowing a proof image to be printed on the calibration plate, the screen pivoted upwards on its wrist joint, and the base section, alignment bar and attached calibration plate moved in any direction in a horizontal plane required to bring the proof image into precise registration with a reference point or image on the object to be printed, clamped in that position, and the calibration plate removed, whereupon a precisely aligned image may be printed on an object on the platen.

REFERENCES:
patent: 2796831 (1957-06-01), Heestand
patent: 4722272 (1988-02-01), Caruccio et al.
patent: 4846058 (1989-07-01), Farris
patent: 5018441 (1991-05-01), Miraglia, Jr.
patent: 5161460 (1992-11-01), Andersen et al.

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