| 摘要 |
An improved portable cassette recorder for use in an imprinter or the like, the recorder being adapted to process fanfolded transaction log sheets or the like. The recorder includes a sensing pin mechanism which senses registration holes in the log sheets to ensure that data entry blocks in the log sheet are in registry with the recorder imprinting station. In order to advance the log sheet from one entry block to the next, the sensing pin is first lowered beneath the log sheet and awaits the next registration hole, the pin being so shaped as to ensure positioning thereof beneath the log sheet. When the next registration hole arrives, the pin is urged upwardly through the hole. At the same time, a brake engaging mechanism is actuated to brake the take-up spool through a bell crank and push rod mechanism and thus maintain the data entry blocks in registry with the imprinting station. An anti-back up device is also provided which prevents back up of the take-up spool as long as a pivotable lid for the recorder is closed. When the lid is opened, the anti-back up device is disabled to permit removal of the processed log sheets from the take-up spool. A tensioning member is also provided for holding the log sheet in place within the recorder even though the trailing edge of the log sheet has left the log sheet supply cartridge.
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