Apparatus for feeding core material
AssigneeThe Wiremold Company
InventorNorman J. Perusse
Life of this patent
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Abstract
The discharge device of this invention serves to receive axially compressed radially self-sustaining tubular duct in a cartridge form substantially shorter than the fully extended length of the duct and has a restraining collar on an exit end of the discharge device which effects a hoop tension on the compressed core during its passage from the exit end of the device to apply a controlled frictional drag ensuring that the core upon discharge is in a fully extended condition.
Claims4
In a machine for making duct having an outer layer of sheet material and an inner reinforcement of radially self-sustaining tubular core of a given outside diameter which core is supplied in a longitudinally compressed cartridge of a given length shorter than the fully extended length of the core, an apparatus comprising means for drawing a layer of sheet material into the machine, and a core discharge device having a cartridge loading end, an opposite exit end and a collar on the exit end, the collar being a resilient restraining collar which, in a normally relaxed condition, defines a discharge opening of a diameter less than the given outside diameter of the core, the collar being radially expandable to form a discharge opening of enlarged diameter relative to its relaxed diameter to effect a controlled frictional drag during core withdrawal from the discharge device to insure that the core is deposited in its fully extended length onto the layer of sheet material to be drawn therewith into the machine.
Dependencies are inferred from the claim text.