Positioning mechanism for calender rolls
AssigneeAppleton Machine Company
InventorsDavid E. Lamon, Paul J. Klemmer
Life of this patent
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Abstract
A positioning mechanism for calender machines is disclosed. The mechanism employs an interconnected piston and cylinder arrangement whereby the rolls may be separated quickly and subsequently automatically repositioned. When a paper break occurs or when it is otherwise desired to separate the rolls quickly, the cylinders, by means of a lost motion connection, quickly separate the rolls by a specified amount to prevent damage to the apparatus. A hydraulic circuit maintains the spacing required for the lost motion connection and allows for interchanging of rolls of different diameters.
Claims7
A mechanism for vertically positioning a stack of calender rolls relative to a support frame, each roll being mounted to the frame for movement in the vertical direction comprising:
- (a) means for lifting and lowering the top roll of said stack,
- (b) means for lifting and lowering the bottom roll of said stack,
- (c) means for interconnecting the remaining rolls of said stack, one to the other and to said top roll for movement with the latter, said interconnecting means including:
- (i) piston and cylinder assemblies associated with each of said remaining rolls,
- (ii) a lost motion connecting means for interconnecting said assemblies one to the other and to said top roll,
- (d) means for controlling operation of said assemblies to permit or prevent movement of the pistons relative to the cylinders,
- whereby when the pistons are permitted to move the remaining rolls may be sequentially lowered and automatically positioned in contact with each other and said top and bottom rolls, and when the pistons are prevented from moving, the rolls may be rapidly separated, one from the other, by a distance determined by the lost motion connecting means by lowering said bottom roll.
Dependencies are inferred from the claim text.