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Bevel Drive Gear

IP.com Disclosure Number: IPCOM000042710D
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 67K

Publishing Venue

IBM

Related People

Galbraith, RJ: AUTHOR

Abstract

This article relates generally to inked ribbon cartridges and more particularly to ribbon driving means which cause the ribbon to oscillate vertically to present a greater ribbon area to a print head. A pair of gears are normally utilized to pull an inked ribbon through a ribbon cartridge providing an area on which a print head impacts, as shown in Fig. 1. Fig. 2 shows schematically a cross-sectional view of a pair of gears G1, G2 through which an inked ribbon 1 is pulled before it is engaged by a print head (not shown). Gears G1, G2 are mounted on spindles 2, and each is comprised of three sections 3, 4, 5 and 6, 7, 8, respectively. The height, h, of sections 4 and 7 is the same at all points on the circumference of these sections.

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Bevel Drive Gear

This article relates generally to inked ribbon cartridges and more particularly to ribbon driving means which cause the ribbon to oscillate vertically to present a greater ribbon area to a print head. A pair of gears are normally utilized to pull an inked ribbon through a ribbon cartridge providing an area on which a print head impacts, as shown in Fig. 1. Fig. 2 shows schematically a cross-sectional view of a pair of gears G1, G2 through which an inked ribbon 1 is pulled before it is engaged by a print head (not shown). Gears G1, G2 are mounted on spindles 2, and each is comprised of three sections 3, 4, 5 and 6, 7, 8, respectively. The height, h, of sections 4 and 7 is the same at all points on the circumference of these sections. On sections 3, 5, 6 and 8, however, the height, h, is the same over half the circumference and tapers from that height to a height, h/x, in one quarter of the circumference and back up again in one quarter of the circumference to the height, h. Thus, half of each of these sections is beveled. This can be more clearly seen by referring to Fig. 3 which shows a perspective view of a gear G1 and the tapering of the gear teeth from a height, h, to a height, h/x. As shown in Fig. 3, the upper and lower gear sections are arranged so that the gear teeth thereof having the heights, h/x, are disposed in diametrically opposing relationship. are arranged so that when the gear portions of sections 3 and 6 having the height, h, are...