Apparatus for cutting an elongate rubbery strip

Claim 1

An apparatus for cutting an elongate non-vulcanized rubbery strip movable on a predetermined plane and having longitudinal transverse directions, comprising: transmitting means operative to transmit said elongate non-vulcanized rubbery strip in the longitudinal direction thereof and to be brought to a stop when the elongate non-vulcanized rubbery strip reaches a predetermined longitudinal position on said predetermined plane; an anvil located underneath the predetermined plane and formed with an elongated groove extending obliquely to the transverse direction of said elongate non-vulcanized rubbery strip, the anvil having an upper surface substantially in parallel with said predetermined plane, an inner surface directed away from the upper surface at an acute angle and a guide surface spaced apart from the inner surface, the inner surface and the guide surface forming in combination said elongated groove; a cutting mechanism arranged in opposing relation with said anvil across said predetermined plane and provided with a cutting device having a cutting edge portion, a heating device operative to heat the cutting edge portion of the cutting device to a predetermined temperature, a driving device operative to move the cutting device into or out of a cutting position in which the cutting edge portion of the cutting device is received in the elongated groove of said anvil through the elongate rubbery strip in said predetermined longitudinal position and a transfer device operative to move the cutting device along the elongated groove of said anvil when the cutting device is assumed in the cutting position, said cutting device being operative to cut said elongate non-vulcanized rubbery strip on bias throughout the width thereof in cooperation with said anvil when the cutting device is moved along the elongated groove of said anvil; said cutting edge portion of said cutting device being directed away from the upper surface of said elongate non-vulcanized rubbery strip at an angle ranging between about 5 degrees and 20 degrees when the cutting device is moved along said elongated groove of said anvil and being constituted by upper and lower surfaces, the upper surface of said cutting edge portion being directed from said lower surface of said cutting edge portion at an angle ranging between about 5 degrees and about 20 degrees; said cutting device further having a lower surface directed away from the upper surface of said elongate non-vulcanized rubbery strip at an angle ranging between about 10 degrees and about 40 degrees when the cutting device is assumed in said cutting position; said guide surface of said anvil extending substantially in parallel with said lower surface of said cutting device and being spaced apart from said lower surface of said cutting device by a distance falling within a range between about 0.0 mm and about 0.2 mm, when the cutting device is assumed in said cutting position; biasing means shiftable into or out of a pressing position in which the biasing means presses said elongate non-vulcanized rubbery strip against said anvil for maintaining the elongated rubbery strip in said predetermined longitudinal position, the biasing means being in contact with said upper surface of said anvil across said elongate rubbery strip throughout the width of the elongate rubbery strip; and adjusting means operative to adjust positions of said anvil and said cutting mechanism with respect to said elongate non-vulcanized rubbery strip in said predetermined longitudinal position.

Claim 2

An apparatus for cutting an elongate non-vulcanized rubbery strip movable on a predetermined plane and having longitudinal transverse directions, comprising: transmitting means operative to transmit said elongate non-vulcanized rubbery strip in the longitudinal direction thereof and to be brought to a stop when the elongate non-vulcanized rubbery strip reaches a predetermined longitudinal position on said predetermined plane; an anvil located underneath the predetermined plane and formed with an elongated groove extending obliquely to the transverse direction of said elongate non-vulcanized rubbery strip, the anvil having an upper surface substantially in parallel with said predetermined plane, an inner surface directed away from the upper surface at an acute angle and a guide surface spaced apart from the inner surface, the inner surface and the guide surface forming in combination said elongated groove; a cutting mechanism arranged in opposing relation with said anvil across said predetermined plane and provided with a cutting device having a cutting edge portion, a heating device operative to heat the cutting edge portion of the cutting device to a predetermined temperature, a driving device operative to move the cutting device into or out of a cutting position in which the cutting edge portion of the cutting device is received in the elongated groove of said anvil through the elongate rubbery strip in said predetermined longitudinal position and a transfer device operative to move the cutting device along the elongated groove of said anvil when the cutting device is assumed in the cutting position, said cutting device being operative to cut said elongate non-vulcanized rubbery strip on bias throughout the width thereof in cooperation with said anvil when the cutting device is moved along the elongated groove of said anvil; said cutting edge portion of said cutting device being directed away from the upper surface of said elongate non-vulcanized rubbery strip at an angle ranging between about 5 degrees and 20 degrees when the cutting device is moved along said elongated groove of said anvil and being constituted by upper and lower surfaces, the upper surface of said cutting edge portion being directed from said lower surface of said cutting edge portion at an angle ranging between about 5 degrees and about 20 degrees; said cutting device further having a lower surface directed away from the upper surface of said elongate non-vulcanized rubbery strip at an angle ranging between about 10 degrees and about 40 degrees when the cutting device is assumed in said cutting position; said guide surface of said anvil extending substantially in parallel with said lower surface of said cutting device and being spaced apart from said lower surface of said cutting device by a distance falling within a range between about 0.0 mm and about 0.2 mm, when the cutting device is assumed in said cutting position; biasing means shiftable into or out of a pressing position in which the biasing means presses said elongate non-vulcanized rubbery strip against said anvil for maintaining the elongated rubbery strip in said predetermined longitudinal position, the biasing means being in contact with said upper surface of said anvil across said elongate rubbery strip throughout the width of the elongate rubbery strip; and adjusting means operative to adjust positions of said anvil and said cutting mechanism with respect to said elongate non-vulcanized rubbery strip in said predetermined longitudinal position.