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Supporting Rail Structure for Matrix Printhead

IP.com Disclosure Number: IPCOM000050446D
Original Publication Date: 1982-Oct-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 65K

Publishing Venue

IBM

Related People

Olson, ST: AUTHOR [+2]

Abstract

The present apparatus is directed to a supporting structure wherein a matrix printhead is moved along a pair of transport rails. In order to minimize print line distortion as the carrier moves along these two rails, it is critical that the inherent distortion in each of the rails be controlled. This is accomplished by a preexamination of each of the two rails to determine direction in which the rail is distorted or bowed. Then, each of the rails is marked with an indicia to indicate the point of direction of the bowing. When the rails are inserted into the frame, each rail is inserted so that the bowing or distortion in each of the rails will correspond in position to the bowing and distortion of the other rail.

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Supporting Rail Structure for Matrix Printhead

The present apparatus is directed to a supporting structure wherein a matrix printhead is moved along a pair of transport rails. In order to minimize print line distortion as the carrier moves along these two rails, it is critical that the inherent distortion in each of the rails be controlled. This is accomplished by a preexamination of each of the two rails to determine direction in which the rail is distorted or bowed. Then, each of the rails is marked with an indicia to indicate the point of direction of the bowing. When the rails are inserted into the frame, each rail is inserted so that the bowing or distortion in each of the rails will correspond in position to the bowing and distortion of the other rail. This is accomplished by aligning the indicia on each of the rails with a suitable indicator, such as an arrowhead, on the frame of the printer. With this expedient, the effect of rail distortion is minimized since each of the two rails produces a corresponding and controllable distortion effect upon the path of the printhead.

With respect to Fig. 1, frame support plates 1 support a pair of transport rails 2 which will serve as guide rails for the matrix printer printhead to be subsequently mounted on these rails. These support rails 2 are subject to some degree of bowing. Such bowing will influence the path of any printhead mounted on these rails. The present expedient provides an identification mark 4 on each of the rails. These marks 4 are placed on the rails to indicate particular directi...