Slitter for slitting a wide sheet into narrow strips and a controller and a controlling method for the slitter
AssigneeFuji Photo Film Co., Ltd.
InventorMasashi Aoki
Life of this patent
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Abstract
Slitting knife arrangement in a slitter is controlled by a controller by use of a fixed common program without changing the program when a new setting of slitting knife arrangement is specified. To derive a series of signals to move slitting knives in the slitter, the controller requires input of a next slitting width and the number of slitting knives to be used next. In addition to the two input parameters, additional parameters of current positions of the slitting knives and the number of slitting knives currently used can be acquired from memory in the controller for deriving the series of signals.
Claims7
A controller for controlling slitting knife arrangements in a slitter for slitting a wide sheet into a plurality of narrow strips by use of a plurality of slitting knives mounted on one or more shafts each extending in a direction substantially normal to a direction in which the wide sheet is fed, comprising:
- input means for specifying a next slitting width and the number of slitting knives to be used next as input parameters;
- and
- arithmetic means which receives said next slitting width and said number of slitting knives to be used next from the input means, and operates to generate a series of signals for moving said plurality of slitting knives to respective positions that effect slitting with said next slitting width and said number of slitting knives to be used next by use of a fixed common program.
A slitter for slitting a wide sheet into a plurality of narrow strips comprising:
- a plurality of slitting knives mounted on one or more shafts each extending in a direction substantially normal to a direction in which the wide sheet is fed;
- input means for specifying a next slitting width and the number of slitting knives to be used next as input parameters;
- arithmetic means which receives said next slitting width and said number of slitting knives to be used next from the input means, and operates to generate a series of signals for moving said plurality of slitting knives to respective positions that effect slitting with said next slitting width and said number of slitting knives to be used next by use of a fixed common program;
- and
- knife moving means for moving each of said plurality of slitting knives in the manner specified by said series of signals.
A method for controlling slitting knife arrangements in a slitter for slitting a wide sheet into a plurality of narrow strips by use of a plurality of slitting knives mounted on one or more shafts each extending in a direction substantially normal to a direction in which the wide sheet is fed, comprising the steps of:
- specifying a next slitting width and the number of slitting knives to be used next as input parameters;
- generating a series of signals for moving said plurality of slitting knives to respective positions that effect slitting with said next slitting width and said number of slitting knives to be used next by use of a fixed common program;
- and
- moving each of said plurality of slitting knives in the manner specified by said series of signals.
Dependencies are inferred from the claim text.