Method and apparatus for producing sealing washers
OwnerWilliam Gould, Charna Gouldinventors
Life of this patent
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Abstract
A machine for producing tubular fastener sealing members having rolled ends includes an apertured guide member cutting block backed by a pair of clamp members and which feeds tubular stock of resilient material between the clamp members through the guide block. A rotating knife is associated with the guide block and an axially reciprocating rotating shaft supports an edge rolling tool confronting and coaxial with the guide aperture. The components are motivated and sequenced to open the clamp until the tube is advanced to the tool, close the clamp, advance the tool to roll the tube leading edge, open the clamp and retract the tool which is followed by the tube, close the clamp, further retract the tool, and slice the finished product from the tube stock.
Claims8
A machine for producing tubular sealing elements comprising a guide member having a longitudinally extending guide opening motor driven intermittent feeding means for withdrawing plastic tubular stock from a source thereof and advancing it along a predetermined path coaxially extending through said guide opening, cutting means located proximate said guide member and movable across said predetermined path of said tubular stock, an axially reciprocatable spindle forward of and coaxial with said guide opening a motor driven rolling tool mounted on an end of said spindle and coaxially confronting said guide opening and movable with said spindle between advanced and retracted positions proximate and remote from said guide member respectively, means for rotating said spindle, and sequencing means successively advancing said tubular stock along said predetermined path through said guide opening into engagement with said rolling tool in at least a partially retracted position, interrupting the advance of said tubular stock, advancing said rotating spindle and tool to roll the leading end of said stock, at least partially retracting said tool and advancing said tubular stock, interrupting the advance of said tubular stock and advancing said cutting means across said tubular stock to sever a sealing element therefrom rearwardly of the rolled edge.
Dependencies are inferred from the claim text.