Browse Prior Art Database

Turret Imprinter

IP.com Disclosure Number: IPCOM000076358D
Original Publication Date: 1972-Feb-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 59K

Publishing Venue

IBM

Related People

Hancock, WC: AUTHOR

Abstract

This imprinter enables an imprint configuration to be changed automatically after a predetermined number of impressions, without stopping the press or collator with which it is associated.

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Turret Imprinter

This imprinter enables an imprint configuration to be changed automatically after a predetermined number of impressions, without stopping the press or collator with which it is associated.

As illustrated, four hexagonal-shaped magnetic print cylinders 1 are mounted on respective shafts 2 carried by a drum 3 rotated by shaft 4. Each cylinder 1 comprises a plurality of wafer-like magnets 5 with interleaved spacers 6. A pair of generally U shaped or semihexagonal arch magnetic printing plates 7, each overlying one peripheral half of the magnet-spacer array, are held attracted by the magnets to the array to provide six print surfaces A-F (three per plate). Each cylinder 1 is connected to a respective crank arm 8 that carries a corresponding roller follower 9. All followers ride continuously in a common cam track 10 formed in one side of control member 11.

As drum 3 rotates, a preselected print surface (e.g., A) of each plate 7 is inked from ink roll 12, then carried into printing contact with a web 13 that is backed up by impression cylinder 14. Cam track 10 is configured so that arm 8 will not oscillate the cylinders 1 while they are in contact with the web. Some oscillation will generally occur during other phases of a complete revolution while member 11 contacts "OFF" stop 15; but such oscillation may be externally damped or will normally not be sufficient to cause spring-biased pawl 16 to grab a tooth on ratchet wheel 17. However, upon a given signal (e.g., the printing of a predetermined number of impressions after a predetermined number of revolutions) suitable means, not shown, will operate to rock member 11 cou...