| 摘要 |
A mechanism is provided with a slide adjustment member that is mounted on a frame supporting a carriage assembly of a printer. The carriage assembly is pivotally mounted upon a support shaft carried by a frame. The slide adjustment member has indexing teeth that engage with a plurality of saw-tooth detents. The sawtooth detents are longitudinally disposed upon a surface that is at a slight angle in the range between 3 and 4 degrees, and preferably about 3.44 degrees with respect to the horizontal. Horizontal movement of the slide member over this angled surface causes the carriage assembly to pivot about the support shaft. In so pivoting, the printhead carried upon the carriage assembly is forced to move with respect to the platen, thus changing the paper thickness gap therebetween. Each indexed movement of the slide member past a detent tooth provides a change of 0.003 inches in the gap. This change is equivalent to the difference between single and double ply paper. Thus, the invention provides a simple, low cost slide member and sawtooth index surface for changing the paper gap between the printhead and platen.
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