| 摘要 |
PCT No. PCT/SE87/00096 Sec. 371 Date Aug. 29, 1988 Sec. 102(e) Date Aug. 29, 1988 PCT Filed Feb. 27, 1987 PCT Pub. No. WO87/05250 PCT Pub. Date Sep. 11, 1987.A machine joins edge stiffening means (2), longitudinal and transverse spring wires (6, 6') of a spiral spring cushion (1), e.g. a car seat. A machine table supports the cushion, clamping heads (37) cut off a blank from a strip (38) and bend it around edge stiffening means and wires. A clamping head reciprocating puncher is located outside the cushion and has a cutting edge (48) and a bending die (52) with a groove (47) for receiving the blank, edge stiffening means a wire (6). A dolly part (39) cooperating with the puncher (40) is devised for cutting off a clamping blank and to form a clamp around edge stiffening means and wire (6) when bringing the clamping puncher in contact with the dolly die. The dolly die is shaped such that a portion carrying a groove (46) for clamping blank, edge stiffening means and wire in operative position for clamping projects upwards above the surface of the machine table (20) while said portion in its inactive position is located below said surface to render possible displacement (19) of the cushion in the direction of the edge stiffening means without any obstruction from transversely extending wires. |
