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Platen to Printhead Face Adjustment Tool

IP.com Disclosure Number: IPCOM000045397D
Original Publication Date: 1983-Mar-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Choberka, JM: AUTHOR [+4]

Abstract

In assembling a wire matrix printer, it is necessary to adjust the printhead face to platen distance to be a constant amount. Conventionally, this has been done by using a feeler gauge set between the platen and the print face and manually applying force against the printhead. However, this presents a problem in that different amounts of force are used by different operators and also by the same operator on different machines, such that the distance between the printhead face and the platen can vary.

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Platen to Printhead Face Adjustment Tool

In assembling a wire matrix printer, it is necessary to adjust the printhead face to platen distance to be a constant amount. Conventionally, this has been done by using a feeler gauge set between the platen and the print face and manually applying force against the printhead. However, this presents a problem in that different amounts of force are used by different operators and also by the same operator on different machines, such that the distance between the printhead face and the platen can vary.

Referring to the figure, the platen-printhead face adjustment tool eliminates this problem of variable force. The tool is mounted on the printhead face with the printhead retracted. The head is slowly released and springs in the printhead apply a constant force to the face of the printhead. In this manner, the tool is captured against the platen. The uniform load of the springs on the printhead assures the same pressure at the time of adjustment from printhead to printhead and from operator to operator. The tool may be made of stock thickness to give the desired space between the platen and the print face.

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