Title:
COIL AND COIL HEAD FORMATION DIES FOR COILS WITH NON-CONVENTIONAL TERMINAL CONVOLUTIONS
Document Type and Number:
WIPO Patent Application WO2004030845
Kind Code:
A2
Abstract:
Machinery for automated manufacture of formed wire structures such as innerspring assemblies for mattresses and seating and flexible support structures includes one or more coil formation devices configured to produce generally helical spring coils having a terminal convolution which extends beyond an end of the coil; a conveyor system having a plurality of flights slidably mounted upon a continuous track and connected to a chain and driven by an index driver; a coil transfer machine which removes a row of coils from the conveyor and inserts the coils into an innerspring assembler; and an innerspring assembler. A coil forming block on a coiler machine has a cavity in which a terminal convolution of the coil is formed, and from which the coil is cut by a cutter which extends into the cavity. Coil head formation dies at coil head forming stations of the coil forming machine also have a cavity for receiving a terminal convolution of a coil, and flanges which surround the cavity and provide a punch set for punches which form a coil head proximate to the terminal convolution in the die.
Inventors:
DEMOSS LARRY (US)
ZHOU JOE (US)
ZHOU JOE (US)
Application Number:
PCT/US2001/051225
Publication Date:
April 15, 2004
Filing Date:
November 13, 2001
Export Citation:
Assignee:
SEALY TECHNOLOGY LLC (US)
DEMOSS LARRY (US)
ZHOU JOE (US)
DEMOSS LARRY (US)
ZHOU JOE (US)
International Classes:
B21F33/04; B21F; (IPC1-7): B21F/
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