System for multi-color printing with object registration means

Details System for multi-color printing with object registration means System for multi-color printing with object registration means

1998-01-20

1999-01-12

Yan, Ren

Printing

Special article machines

Rotating object

101123, B41F 1708

Patent

active

058574093

ABSTRACT:
Semi-automatic screen printing equipment for multi-color printing of cylindrical objects wherein precise color-to-color registration may be achieved. A programmable color sensor, photoelectric system using fiber optics is preferably employed for reading a color image reflection from a rotating object and feeding a resulting signal into a pre-programmed color selector for providing an electrical signal to an electric clutch. The electric clutch engages a mechanical interlock drive between the screen printing plate and the object for precise color to color registered printing. A fixture is used for rotatably supporting an object to be printed. A screen and a squeegee for contacting the screen are used to force printing material through openings in the screen for application to the object surface. A first rotatable shaft is connected to the fixture, and a second rotatable shaft is provided. Clutch means connect these shafts for engaging and disengaging driving action therebetween. A first ratchet is mounted on the second shaft for rotation therewith, and a first pawl is located in a fixed position adjacent this shaft and is engageable with the first ratchet to restrict rotation of the second shaft in one direction while permitting rotation of the second shaft in the opposite direction. A second ratchet is mounted adjacent the second shaft, and a second pawl is mounted on the second shaft and is engageable with the second ratchet whereby rotation of this ratchet in the opposite direction operates to rotate the second shaft.

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patent: 5046412 (1991-09-01), Dubuit et al.
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patent: 5524535 (1996-06-01), Strutz et al.
patent: 5553547 (1996-09-01), Miller
patent: 5651308 (1997-07-01), Rohwetter et al.

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