Method of converting web or sheet material and press for applying said method
AssigneeBobst SA
InventorsJean-Claude Rebeaud, Andre Vessaz
Life of this patent
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Abstract
A method for curvilinearly converting of web or sheet material by compression of the material between an upper table and a lower table. The tables are each connected to a respective supporting structure and operate conjointly on either side of the plane of travel of the material along a longitudinal axis. During the compression phase, there is a phase of essentially unidirectional intentional elastic deformation of a structure of one of the tables. The deformation increases and then decreases as the curvilinear surface of one table rolls past the other table, for providing generally more uniform compression as the surface rolls. An apparatus for the compression includes the structure described.
Claims15
A method for curvilinear converting of web or sheet material by compression between an upper table and a lower table wherein the tables are connected to a supporting structure and the tables work conjointly on either side of the plane of travel of the material along a longitudinal axis, the method comprising compressing the material between the upper and lower tables during a compression phase and during the compression phase, permitting a phase of essentially unidirectional, intentional, elastic deformation of a structure of a first one of the tables.
A press for curvilinear converting of web or sheet material by compression, comprising
- an upper table and a lower table, a respective supporting structure for each of the tables and operating conjointly on either side of the plane of travel of the material on a longitudinal axis, at least one of the tables being movable relative to the other table;
- a curvilinear work surface supported on one of the tables;
- one of the tables comprises at least one variable stiffness member operable to deform elastically intentionally during a compression phase wherein the at least one table moves to compress the material.
Dependencies are inferred from the claim text.