Patent ID: 7654297
Filing Date: 2010-02-02
Classification: B65H,Y10T

Abstract:
1. A correction tape dispenser comprising: a front cover being longitudinal and having a top, a bottom, two sides, a front end, a rear end, a cavity defined in the front cover, a front opening communicating with the cavity and an open slot defined in the rear end through the top and communicating with the cavity; a core assembly mounted in the cavity and having a top, a front end, a convex portion protruding from the top of the core assembly and slidably extending through the open slot in the front cover, a core and a head; a slide bracket mounted slidably in the cavity and mounted on and moving with the core assembly; an extending-and-retracting mechanism mounted on the slide bracket and having a shaft having a front end, a rear end and multiple ridges formed on and extending radially from the shaft adjacent to the front end of the shaft, a cylinder being hollow and tubular and mounted slidably and rotatably around the shaft, and a bias element mounted between the slide bracket and the front end of the shaft; a rear cover being longitudinal, mounted on the front cover and having a front end, a rear end, a chamber defined in the rear cover and having a front inside wall, a mounting hole defined in the rear cover, slidably receiving the cylinder and the shaft and having an inner surface, multiple ribs formed on and extending radially inward from the inner surface of the mounting hole and multiple grooves defined in the inner surface of the mounting hole respectively between adjacent ribs, divided into two sets of alternate grooves, each of the alternate grooves of one set having a block formed in the groove, the alternate grooves with the blocks engaging respectively with the ridges on the shaft as the head of the core assembly extends out of the front cover, and the alternate grooves without the blocks engaging respectively with the ridges as the head retracts backward into the front cover; and a spring mounted in the chamber in the rear cover between the front inside wall and the slide bracket.