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It may be more desirable to retool the slitter at a work area or bench where an inventory of knives and spacers are conveniently kept. In many slitting operations space is a significant obstacle and it may not be possible or desirable to retool the slitter at the slitting line. If the jacks are disconnected, they must usually be carefully reset because of the backlash in the gearing employed. Moreover, when hydraulically operated jacks are employed which must be connected and disconnected during set-up changes, additional down time is required both to disconnect the jacks and any electrical or hydraulic lines involved and also to reset the jacks with the aid of a counter or other suitable mechanism to insure proper arbor parallelism. PG,3 Such turret arrangements, however, require a significant capital investment which must be balanced against the down time of the slitting line to make set-up changes. 3,513,743 and 3,727,503 for illustrations of multiple head slitters utilizing a turntable. The heads may be mounted on a turret and the heads rotated into and out of operative position. This problem has to some extent been obviated by the use of slitting lines employing multiple heads. The set up of the slitting knives is a time consuming operation and if the set up is done at the slitting line, it requires that the slitting line be down or inoperative for an inordinate length of time. Such variations occur frequently and to change the set up of the knives usually requires partial disassembly of the slitter to expose the ends of the arbors so that the knives and spacers may be removed and replaced. However, if variations are desired in the number and widths of the slit strip, or if the grade or gage of the metal strip changes, the spacing of the knives on the arbors may require to be changed. The slitting knives may be placed on the arbors at any desired location to control the number and widths of the slit strip.
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Usually the top arbor is positioned by hydraulically operated jacks to be moved in parallelism with the bottom arbor to control the vertical spacing of the cooperating knives. The slitter includes parallel arbors on which the slitting knives are positioned. In a slitting line, relatively wide strip is cut in to a number of relatively narrower widths usually by pulling the strip through a slitter. This invention relates generally as indicated to a slitter and more particularly to a metal slitter having a readily removable slitter head.
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The slitter includes a horizontally movable actuator with locating pins for quick assembly. An overhead crane may also be employed to remove or replace the head from or to the storage or tooling location. A turntable may be employed to move the disconnected head to a storage or retooling location. The idle housing and arbors forming the removable head contain no gearing, jacks, jack drive connections or fluid or electrical lines requiring connection or disconnection. The lower arbor journal block of the idle housing includes a T-slot socket engageable with one or more jacks at a certain horizontal position so that arbors of different length may be employed. The idle housing and arbors are movable on the base as a unit away from the drive housing so that the idle housing and arbors may readily be removed and replaced. The lower arbor is journaled in vertically movable blocks with a jack system in the base thus moving the lower arbor. A slitter and readily removable head includes a drive housing and an idle housing projecting from a base with the arbors for the slitting knives extending between the housings.