| 摘要 |
Compactly nested, generally V-shaped clips, each intended to hold the end of a sinuous spring, are stacked in a chute. U-shaped staples or nails are separately stacked in a magazine. In each clip there are two angularly related flanges, both perforated for fasteners. The clip to be fastened is machine fed to a fastening station where the clip is secured by a first fastener and the upper flange of the clip is bent into position to hold the spring securely. The end of the sinuous spring is then inserted between the flanges and a second fastener may then, if desired, be driven through both flanges. When and if the second fastener is driven, no clip can be advanced from the clip stack, the clip transfer mechanism being manually rendered inoperative.
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