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Improved Method of Belt Attachment in a Belt Escapement System

IP.com Disclosure Number: IPCOM000059989D
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Corbin, JS: AUTHOR [+2]

Abstract

This article describes a simple, low-cost method of attaching a toothed timing belt to a printer carrier in a printer utilizing a belt escapement system. In this arrangement, a timing belt 10 is attached to a carrier by interlacing the belt between a curved formed rack 11 and two side tabs 12 and 13. The rack 11 and tabs 12 and 13 are stamped from aluminum and formed in a progressive die. The belt 10 can be laterally installed between the rack and tabs, and then tension applied. The applied tension T causes positive engagement between the belt and rack, and, because the exit angle of the rack is equal to the pressure angle of the timing belt tooth profile, a non-slip attachment is provided. Some advantages follow.

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Improved Method of Belt Attachment in a Belt Escapement System

This article describes a simple, low-cost method of attaching a toothed timing belt to a printer carrier in a printer utilizing a belt escapement system. In this arrangement, a timing belt 10 is attached to a carrier by interlacing the belt between a curved formed rack 11 and two side tabs 12 and 13. The rack 11 and tabs 12 and 13 are stamped from aluminum and formed in a progressive die. The belt 10 can be laterally installed between the rack and tabs, and then tension applied. The applied tension T causes positive engagement between the belt and rack, and, because the exit angle of the rack is equal to the pressure angle of the timing belt tooth profile, a non-slip attachment is provided. Some advantages follow. No additional parts are required to attach the timing belt to the carrier since the necessary features are formed directly in the carrier. Installation and assembly are simplified so cost is reduced. The belt attachment is non-slip. If the exit angle of the curved rack exceeds the belt tooth profile pressure angle, then a non-slip attachment is guaranteed; i.e., the belt will not "ride up" on the rack. The belt tension and rack/side tab geometry ensure a positive engagement between the belt and rack. The belt attachment has zero backlash. If the rack groove width is equal to or slightly less than the belt tooth width, then the belt tension will introduce a "wedging" action between the rack a...