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Incremental Wire Feed

IP.com Disclosure Number: IPCOM000092234D
Original Publication Date: 1968-Oct-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Bowman, C: AUTHOR

Abstract

A pneumatic device for feeding wire 10 includes housing 12 having bore 14 for passing the wire. Housing 12 is formed to provide cylinder portion 16 which is closed by cap 18 having bore 20 for passing wire 10. Upper and lower stop abutments 22 and 24 within cylinder 16 limit the travel of free piston member 26, also having bore 28 for passing wire 10. Piston 26 is reciprocated vertically by operation of air or other fluid pressure admitted to the cylinder via ports 28 and 30.

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Incremental Wire Feed

A pneumatic device for feeding wire 10 includes housing 12 having bore 14 for passing the wire. Housing 12 is formed to provide cylinder portion 16 which is closed by cap 18 having bore 20 for passing wire 10. Upper and lower stop abutments 22 and 24 within cylinder 16 limit the travel of free piston member 26, also having bore 28 for passing wire 10. Piston 26 is reciprocated vertically by operation of air or other fluid pressure admitted to the cylinder via ports 28 and
30.

Piston 26 carries diaphragm member 32 having a central aperture 34. This opens when diaphragm 32 is in its upwardly deformed position as in the left-hand drawing. Aperture 34 closes when diaphragm 32 is in its downwardly flattened position as in the right-hand drawing. When aperture 34 is open, it releases wire 10 and, when it is closed, it grips wire 10.

When fluid is introduced by port 30 as indicated by arrow 34 and bled via port 28 as indicated by arrow 36, the pressure differential acting on piston 26 and diaphragm 32 acts to open aperture 34 and to move piston 26 upwardly. Wire 10 is stationary during this piston motion. When fluid 38 is admitted via port 28 and bled via port 30 as indicated at 40, the pressure differential in cylinder 16 flattens diaphragm 32 so as to close its aperture 34 about wire 10 and propel wire 10 downwardly along with the motion of piston 26. A second diaphragm 42 can be added to help hold wire 10 stationary during upward motion of pisto...