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Matrix Printer

IP.com Disclosure Number: IPCOM000088556D
Original Publication Date: 1977-Jun-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 19K

Publishing Venue

IBM

Related People

Barrekette, ES: AUTHOR [+2]

Abstract

This article describes a matrix printer which allows printing while the paper moves continuously. There is a print element for each dot print position, and an actuator shared by a subset of print elements. The subset of print elements is arranged linearly and inclined to the horizontal in such a way as to compensate for paper motion. The arrangement is repeated for each actuator.

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Matrix Printer

This article describes a matrix printer which allows printing while the paper moves continuously. There is a print element for each dot print position, and an actuator shared by a subset of print elements. The subset of print elements is arranged linearly and inclined to the horizontal in such a way as to compensate for paper motion. The arrangement is repeated for each actuator.

In a first configuration (not illustrated) the print elements consist of leaf springs with dot bearings at their tips. The actuators are electromagnets spanning several dot print positions which may be as few as two and as many as those spanned by several character positions. The span of the actuator is chosen in such a way as to optimize the tradeoff between speed and cost.

Between the leaf spring print elements and the actuators is a belt carrying interposers with clearances to allow only one leaf spring to be pulled towards each actuator. Thus, by synchronizing the activation of the actuators with a position of the clearances in the interposers it is possible to activate the appropriate print elements to print a desired dot. The belt with interposers moves continuously so that no reciprocating action is necessary.

In a second configuration, as illustrated in the figure, there are ballistic wires 2 at each dot location, with hammers 4 and 6 spanning several print elements. A belt carrying interposers 8 and 10 moves continuously between the wires and hammers. The interpos...