| 摘要 |
This invention relates to an improved strip label printer and especially to a shuttle mechanism therefor that advances the label strip in incremental fashion and, in addition, functions to actuate the printing head during the time the shuttle is returning to its original position preparatory to starting another label-advancing stroke. This shuttle mechanism is characterized by a specially-shaped slide block that includes label-engaging ears working through slots in a bedplate over which the label strip moves and also a hump-like fulcrum between these ears that engages the underside of the bedplate and functions to tilt the slide block in a direction as to elevate the ears into operative position during the forward stroke lowering them into inoperative position beneath the strip on the return stroke when shuttled back and forth by the crank and pitman drive therefor. The shuttle also includes a unique axially-adjustable shuttle deactivation mechanism which engages the slide block during a preselected portion of its forward stroke and delays the emergence of its ears into operative position until they reach the proper point to engage and advance the next label.
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