| 摘要 |
A lazy-susan type roll table supports, in a vertical position, a roll of place mats interconnected into a continuous web (i.e. each mat is attached to its adjacent mat by perforations and all are rolled up on a core to form the roll of material). A web feed roller, also disposed for rotation about a vertical axis, is spaced from the roll table and cooperates with a pinch roller to grip therebetween the web of place mats and to feed the place mats along a path. An end panel positioning plate receives the end place mat, as the web is being fed, and carries an infra-red sensor which responds to the presence of the perforations between the mats to terminate drive of the web feed roller. A web tension drive extends up through the core of the roll of place mats and mounts a soft rubber drive wheel which when driven urges the web roll in a direction opposite to that imparted to the web by the web feed roller. Control circuitry actuates the tension drive when web feed drive terminates to apply tension to the web and facilitate severing of the end place mat, from the other place mats, along the perforations when the end place mat is positioned at the end panel. The end panel also carries a micro-switch which senses the absence of the just separated end place mat to terminate power to the tension drive and start web feed drive to repeat the process of positioning a place mat at the end panel. A jogging switch is provided to facilitate short web advancing operations of the web feed and an oscillator is provided to adjust the length of advance of the web to thereby compensate for different size place mats.
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