Metal working – Plural diverse manufacturing apparatus including means for... – With means to feed work during tool contact
Patent
1976-08-09
1978-04-18
Moon, Charlie T.
Metal working
Plural diverse manufacturing apparatus including means for...
With means to feed work during tool contact
29819, 2924358, 29509, 72142, B23Q 500
Patent
active
040843092
ABSTRACT:
An apparatus and method for manufacturing flexible duct comprising feeding a strip of cloth and a channel formed strip of metal in parallel through a work station having a pair of crimping rollers which fasten an edge of the fabric into the channel. A forming ring is provided at the work station to guide a first coil of fabric attached to channel strip around to meet and overlap a second coil of fabric being fed into the work station. A roller member is rotatably fixed above the work station to force the overlapping edges of adjacent coils of fabric down into the channel of the metal strip being simultaneously fed in parallel with the fabric toward the crimping rolls. The roller member carries with it a string which it inserts into the channel over the overlapping edges of the fabric prior to the combined materials being fed into crimping rollers where they are forced into a retained and fixed position within the enfolded arms of the crimped channel of metal. The string provides a filler to bulk up the interior of the channel cavity to prevent the overlapping edges being pulled out of the seam provided by the closed channel of metal strip.
REFERENCES:
patent: 2506232 (1950-05-01), Murphy
patent: 2539814 (1951-01-01), Chernack
patent: 2592336 (1952-04-01), Rejeski
patent: 2636541 (1953-04-01), Rutherford
Hill Kerry Maxwell
Moon Charlie T.
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