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Pressure Roller Alignment to Capstan

IP.com Disclosure Number: IPCOM000078589D
Original Publication Date: 1973-Feb-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Church, JA: AUTHOR [+2]

Abstract

Repeatable parallel alignment of capstan 1 and pressure roller 2 allows tape 3 to be continuously driven in a straight line without skewing on roller 2. This alignment is provided by insuring that the axis of roller 2 is parallel to the axis of capstan 1.

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Pressure Roller Alignment to Capstan

Repeatable parallel alignment of capstan 1 and pressure roller 2 allows tape 3 to be continuously driven in a straight line without skewing on roller 2. This alignment is provided by insuring that the axis of roller 2 is parallel to the axis of capstan 1.

Figs. 1, 2, and 3 show end views of tape cartridge 4 adapted for engagement with capstan 1. Capstan 1 is rotatable mounted in frame 5 and roller 2 is rotatable about shaft 8, so that the axes of roller 2 and shaft 8 coincide. Shaft 8 is mounted in enlarged hole 9 on opposite walls of cartridge 4 so that roller 2 is positioned between these walls. One end of spring 10 biases shaft 8 against holes 9, while the other end of spring 10 is attached to cartridge 4 at pin 11. Spring 10 pivots about stud 12. Capstan 1 and shaft 15 have coincident axes and are rigidly attached to each other. Shaft 15 is rotatably mounted in bearings 16 in opposite walls of frame 5. Edges 17 on opposite sides of frame 5 are precisely machined to define a plane parallel to the axes of capstan 1 and shaft
16.

In Fig. 1 all components of cartridge 4 are shown out of contact with frame 5 and capstan 1. In Fig. 2, insertion of cartridge 4 for engagement with capstan 1 has begun. Each end of shaft 8 is biased into contact with opposite edges 17 of frame 5 by spring 10. At this point, although shafts 8 and 15 may lie in parallel planes, shafts 8 and 15 are not necessarily parallel to each other. In Fig. 3, car...