Method and apparatus for the manufacture of fusecord
AssigneeImperial Chemical Industries PLC
InventorRobert M. Aitken
Life of this patent
Estimating the term…
Abstract
A method and apparatus for the manufacture of explosive fusecord the method comprising continuously advancing and convoluting a carrier tape into hollow tubular form, feeding a stream of explosive material into the tubular carrier tape to form an explosive core encased by the carrier tube and subsequently applying reinforcing materials around said carrier tube, said carrier tape being convoluted by passing through shaping guide means, the passage of the carrier tape through the guide means being assisted by pulling an auxiliary transport belt through the guide means, said transport belt being in frictional contact with said carrier tape. The method facilitates higher fusecord production speeds by preventing stretching or rupture of the carrier tape.
Claims7
A method of manufacturing explosive fusecord comprising continuously advancing and convoluting a carrier tape into hollow tubular form, feeding a stream of explosive material into the tubular carrier tape to form an explosive core encased by the carrier tube and subsequently applying reinforcing materials around said carrier tube, said carrier tape being convoluted by drawing through shaping guide means under tension by draw means located downstream of the guide means, the passage of the carrier tape through the guide means being assisted by pulling an auxiliary transport belt through the guide means, said transport belt being in frictional contact with said carrier tape and moving at a speed substantially the same as the carrier tape so as to allow some slippage between the tape and the belt to ensure that the tape is maintained under tension in the guide means by said draw means.
An apparatus for manufacturing explosive fusecord comprising draw means to advance a carrier tape in a linear path under tension, shaping guide means to convolute said tensioned carrier tape into tubular form, an auxiliary transport belt trained through the guide means, said transport belt being adapted to conform to the shape of the guide surfaces and frictionally to engage the carrier tape, drive means to pull the auxiliary transport belt through the guide means in the same direction and substantially at the same speed as the carrier tape so as to allow some slippage between the tape and the belt to ensure that the tape is maintained under tension in the guide means by said draw means, feed means to deliver a stream of explosive material to form an explosive core in the carrier tube and means to apply reinforcing material around the tubular carrier tape.
Dependencies are inferred from the claim text.