Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1983-06-24
1985-02-12
Gilreath, Stanley N.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 36, 242 47, 226 45, 235103, B65H 5938, B65H 6300
Patent
active
044986386
ABSTRACT:
An apparatus is described for maintaining and delivering a slack reserve length of lead wire between a spool or other source and the wire bonding tool of a lead wire bonding machine. A slack chamber or wind chamber comprised of a housing enclosure, an inlet guide on one side for guiding lead wire into the slack chamber from a spool, an outlet guide on the other side for guiding lead wire out of the slack chamber towards the wire bonding tool maintains the reserve length of lead wire in untangled condition. A source of pressurized dry air or other gas directs a gaseous flow into the slack chamber so that the lead wire is maintained suspended in the gaseous flow in an offset configuration. Wire sensors are operatively positioned in the slack chamber for sensing the offset of lead wire in the wind stream. The wire sensors are coupled to sensor and control logic for controlling the delivery and feeding of lead wire from a spool into the slack chamber. The wire sensors define inner and outer limits of offset thereby maintaining the reserve length within a desired range. Additional elements for back-up control of the lead wire and for handling the spool are described.
REFERENCES:
patent: 2865103 (1958-12-01), Lolley et al.
patent: 2944750 (1960-07-01), Hall, Jr.
patent: 3908920 (1975-09-01), Hermanns
patent: 4019669 (1977-04-01), Tanimoto et al.
patent: 4025026 (1977-05-01), Merritt et al.
patent: 4195292 (1980-03-01), Puhich
patent: 4274605 (1981-06-01), Gruber, Jr.
Cousens Donald E.
Dufour Mark D.
Kurtz John A.
Fairchild Camera & Instrument Corporation
Gilreath Stanley N.
Kane, Jr. Daniel H.
Olsen Kenneth
Silverman Carl L.
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