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Pulley Segmented into Low Vibration and Resynchronization Sections

IP.com Disclosure Number: IPCOM000084972D
Original Publication Date: 1976-Feb-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Daniels, RA: AUTHOR [+3]

Abstract

In a copying machine it is important to drive the image drum with little or no vibration, as vibration can diminish the quality of the copy. Shown is a belt drive for the image drum. Belt 10 is a metal belt with holes 11 to engage teeth in pulleys. Pulley 12 is attached to the image drum and carries teeth 14 to engate holes 11 in metal belt 10. Pulley 16 is a segmented driving pulley, while pulley 18 is an idler pulley and has no teeth.

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Pulley Segmented into Low Vibration and Resynchronization Sections

In a copying machine it is important to drive the image drum with little or no vibration, as vibration can diminish the quality of the copy. Shown is a belt drive for the image drum. Belt 10 is a metal belt with holes 11 to engage teeth in pulleys. Pulley 12 is attached to the image drum and carries teeth 14 to engate holes 11 in metal belt 10. Pulley 16 is a segmented driving pulley, while pulley 18 is an idler pulley and has no teeth.

The driving pulley 16 has its surface segmented into two circumferential sections. Segment 20 is a high-friction segment having no teeth. Segment 22 is a low-friction segment that contains teeth 24.

In operation during projection of an image onto the image drum, the metal belt 10 engages the high-friction segment 20 of pulley 16. The high-friction segment 20 provides drive for the belt 10 and the drum pulley 12 with little or no vibration. The drive is vibration free because there are no teeth in the high- friction segment 20.

In a portion of the timing cycle where the image drum is not being imaged, belt 10 engages the low-friction, toothed segment 22 of driving pulley 16. Teeth 24 engage the holes 11 in the belt 10 to insure that the belt 10 is reregistered to an exact position on the driving pulley 16. In effect, the teeth 14 and 24 engage the holes 11 in the belt 10 to resynchronize the position of the belt 10 on pulleys 12 and 16, respectively.

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