Browse Prior Art Database

Print Band Welding Fixture

IP.com Disclosure Number: IPCOM000034500D
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Lee, HC: AUTHOR

Abstract

Print bands having characters and timing marks etched thereon tend to exhibit slight lateral curvature due to internal stresses when cut into narrow strips prior to welding at their ends to form endless loops. The effect of this curvature on the printing alignment is rendered negligible by performing the welding with mating band ends held together on a curved fixture with a radius equal to that of the completed band. In the figure, band 1 is secured for welding on curved fixture 2 under welder head 3 by clamps 4. The clamps detect predetermined timing marks on the band surface, and then grip the band. Fixture 2 may be formed with recesses 5 to further decrease band constraint.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Print Band Welding Fixture

Print bands having characters and timing marks etched thereon tend to exhibit slight lateral curvature due to internal stresses when cut into narrow strips prior to welding at their ends to form endless loops. The effect of this curvature on the printing alignment is rendered negligible by performing the welding with mating band ends held together on a curved fixture with a radius equal to that of the completed band. In the figure, band 1 is secured for welding on curved fixture 2 under welder head 3 by clamps 4. The clamps detect predetermined timing marks on the band surface, and then grip the band. Fixture 2 may be formed with recesses 5 to further decrease band constraint. The fixture radius is equal to that of a welded band and its configuration enables any curved band to assume it natural shape as a transverse slice of a conical surface. The fixture also accommodates straight strips for welding. An installed conically shaped band tracks on its drive and idler pulleys at a height different than a straight band, but the height is typically compensated for by band edge detectors in the drive system.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]