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Automatic Retraction of Print Head Carrier Band

IP.com Disclosure Number: IPCOM000045175D
Original Publication Date: 1983-Feb-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Humphreys, FR: AUTHOR

Abstract

Use of a steel band with a spring-loaded print head allows the head to automatically attain a correct distance setting for single or multiple part forms. The band serves to protect the forms, particularly carbon forms, from the pressure of the print head rollers, and also serves as a paper brake.

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Automatic Retraction of Print Head Carrier Band

Use of a steel band with a spring-loaded print head allows the head to automatically attain a correct distance setting for single or multiple part forms. The band serves to protect the forms, particularly carbon forms, from the pressure of the print head rollers, and also serves as a paper brake.

As shown in the figures, anchor brackets including ramps, are added to the conventional band and roller construction to allow the bands to be flush against the forms while printing is taking place, and then to be retracted away from the forms when the print head goes beyond the right or left margin to a home position.

Fig. 1 is a side view showing the print head in printing position and the print head roller against the steel band which rests against the paper. Fig. 2 is a top view of the same structure shown in Fig. 1 during the time the head is in the printing position. The steel band is secured on each end by a band anchor bracket which includes a ramp. The pressure of the spring-loaded head holds the band firmly against the paper, thereby holding the paper in place. Fig. 3 shows the print head in the left margin home position. In this position, the print head roller pushes the steel band forward in the anchor bracket such that the slack in the bracket is taken up and the band is held away from the forms by the ramp on the anchor bracket.

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