Drum For A Creasing Device
First Claim
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1. A drum for a creasing device, comprising:
- a first drum part having a cylindrical outer surface and defining a bore for mounting the first drum part about a shaft; and
a second drum part having a cylindrical outer surface and defining a bore for mounting the second drum part about said shaft;
wherein said first and second drum parts are shaped such that the two drum parts may abut one another to define between the first and second drum parts a base and two side walls of a circumferential channel about the drum; and
wherein at least one side wall of the channel defines a recess so that a resilient creasing ring located in the channel and projecting laterally into the recess cannot be withdrawn radially from the channel.
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Abstract
A drum for a creasing device, a resilient creasing ring and method are provided. The drum includes first and second drum parts that cooperate with one another to define a circumferential channel of the drum a base and two side wall for receiving a resilient creasing ring. At least one of the side walls includes recess for receiving a portion of the resilient creasing ring such that the resilient creasing ring cannot be removed radially from the channel. The creasing ring may be continuous or a split ring.
14 Citations
20 Claims
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1. A drum for a creasing device, comprising:
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a first drum part having a cylindrical outer surface and defining a bore for mounting the first drum part about a shaft; and
a second drum part having a cylindrical outer surface and defining a bore for mounting the second drum part about said shaft;
wherein said first and second drum parts are shaped such that the two drum parts may abut one another to define between the first and second drum parts a base and two side walls of a circumferential channel about the drum; and
wherein at least one side wall of the channel defines a recess so that a resilient creasing ring located in the channel and projecting laterally into the recess cannot be withdrawn radially from the channel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A drum for a creasing device, comprising:
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a first drum part having a cylindrical outer surface and defining a bore for mounting the first drum part about a shaft; and
a second drum part having a cylindrical outer surface and defining a bore for mounting the second drum part about said shaft;
wherein said first and second drum parts are shaped such that the two drum parts may abut one another to define between the first and second drum parts a base and two side walls of a circumferential mounting channel about the drum; and
a resilient creasing ring mounted in the mounting channel and seated on the base of the mounting channel, wherein the resilient creasing ring is a continuous ring and has a diameter in a relaxed state that is less than a working diameter of the ring when seated on the base of the mounting channel. - View Dependent Claims (9)
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10. A drum for a creasing device, comprising:
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at least one cylindrical drum part having a cylindrical outer surface and defining an annular mounting channel formed by a base and two side walls; and
a creasing ring mounted within the mounting channel, the creasing ring having an outwardly facing traction surface and a creasing rib projecting radially outward beyond the traction surface, the traction surface being radially proud of the outer surface of the at least one cylindrical drum part when mounted in the mounting channel, and the creasing ring having a uniform cross-section generally orthogonal to a circumference of the creasing ring at all locations along the circumference. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification