| 摘要 |
A paster roller is provided for use on high speed web handling equipment of the type having a support upon which a feed roll and a new roll are mounted. Variable torque brakes associated with each roll exhibit a substantially constant coefficient of friction at all web speeds. Apparatus for splicing the web from the feed roll onto the web from the new roll is provided including a uniquely designed paster roller having a deflectable outer surface with annular grooves situated therein. The brakes each include a brake caliper assembly for use in conjunction with the rotatable shaft upon which the roll is mounted which has a disc member associated therewith. The assembly includes a housing having a bore therein. A port provides a fluid connection between the extension of the housing and the bore. A cylindrical puck member is at least partially received within the bore. A cylindrical piston member is movable within the bore between the port and the puck member and engageable with the latter to exact varying degrees of pressure on the puck member in accordance with the pressure of the port. The piston member has a diameter smaller than the puck member. The disc member has a surface composed of material harder than the material of which the adjacent surface of said puck is composed and having a radial pattern of grooves thereon emanating from the center thereof.
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