US2212457A

US2212457A - Slitting machine

Info

Publication number: US2212457A
Application number: US305183A
Authority: US
Inventors: Frank F Schrier
Original assignee: Moore and White Co
Current assignee: Moore and White Co
Priority date: 1939-11-18
Filing date: 1939-11-18
Publication date: 1940-08-20
Anticipated expiration: 1957-08-20

Description

Aug.2o,194o.l F, F SCHR.ER 2,212,457

SLITTING MACHINE Filed Nov. 18, 1939 3 Sheets-Sheet l Aug. 20, 1940. F. F. scHRu-:R

SLITTING MACHINE 3 Sheets-Sheet 2 Filed Nov. 18, 1959 Aug 20, 1940 F. F. scHRlER 2,212,457

SLITTING MACHINE Filed Nov. 18, 1939 3 Sheets-Shee'kl 3 Patented Aug. 20, 1940 PATENT OFFICE SLITTING MACHINE Frank F. Schrier, Philadelphia, Pa., assigner to The Moore & White Company, Philadelphia,

Pa. a corporation of Pennsylvania Application November 1s, 1939, serial No. 305,183

11 Claims.

This invention relates to slitting machinesk and, more particularly, toA machines of this type usually employed in slitting paper. In the ordinary slitting machine, when a wide web of paper is threaded therethrough and it is desired to slit the web into numerous widths, a1l theslitters are lengaged during the threading operation. This results in the loss of a considerable amount of paper, since the operators have to handle each lo slit width separately, Aand is inconvenient for the operators in that each of the slit widths must be drawn up squarely and at the proper tension to insure proper winding on the winding shaft. Of the slitters employed in such a machine, the l5 `end slitters serve merely to trim the edges of the paper 'and the intermediate 'slitters determine the width of the various sheets which are being formed. It is desirable in threading the paper that all such intermediate slitters be re- 2o?` moved from engagement with the paper, permitting the full width web to be threaded through and engaged with the Winding shaft. This full width web can be very readily properly tensioned and squared to the Winding shaft under these Q51 circumstances, thus eliminating considerable Waste and insuring better winding. y

An important object of this invention is the provision of a .construction enabling all of the intermediate slitter elements to be moved from 3o their operative positions and to be rapidly and conveniently returned to service after the paper web has been threaded through the machine.

' Another object of the invention is the provision vof a construction of this character which may d be very readily incorporated in the ordinary slitter construction, or substituted for the elements of such a construction already existing in a inachine. I

Another object of the invention is the provision O. of a structure of this character incorporating the features above outlined, which may at the same time be adjusted as to its position with the same facility as the ordinary slitter elements now employed.` ;y AThese and other objects I attain by the construction shown in the accompanying drawings wherein, for the purpose of illustration, vI have shown a preferred embodiment of my invention and wherein: I

Fig, l is a fragmentary perspective View of slitter mechanism constructed in accordance with my invention;

Fig. 2 is a fragmentary front elevation show-` ing the vleft-hand side of the machine;

Fig. 20, is a fragmentary front elevation showing a portion of the opposite side of the machine;

Fig. 3 is a front elevation` of a slitter element, the structure being shown in solid lines in its operative position and in dotted lines in its inoperative position; 5'A

Fig. 4 is a rear elevation thereof partially broken away;

Fig. 5 is a side elevation thereof partially broken away; and

Fig. 6 is a section on line 6-6 of Fig. v5.

Referring now more particularly to the drawings, the numeral It] generally designates a rotatable shaft bearing a plurality of slitter discs II, over which the sheet I2 which is to be slit travels. Arranged above the shaft Ill is a bar I3 bearing a plurality of top slitter elements. The top slitter elements include end slitters I4 and intermediate slitters I5, each coacting with one of ther slitter discs Il. The function of the end slitters is that of trimming the edges of the 20'" sheet, while the intermediate slitters I5 cut the sheet into various widths, as desired. AIt is often necessary to shift the position of the intermediate slitters due to the desire to'procluce'varying widths of sheets from the parent sheet delivered from the paper machine, and to this end it is desirable that the intermediate slitter elements I5 be mobile and conveniently controllable. The end slitters are, on the contrary, seldom in need of adjustment and may be of any usual or ordinary construction, such, for example, as that herein illustrated. The construction of these` elements forms no part of the present invention and, accordingly, no description thereof is here given. The intermediate slitters I5 comprise a bracket I5 adapted to clamp upon the bar I3 and to be slidably adjustable therealong. This bracket v embodies a transversely extending bore Il mounting a stud I8, this bore being formed in a boss I9 on the bracket. The boss I9 further incorporates a lateral'nger 2l) the purpose of which will appear hereinafter. Stud I8 pivotally mounts an arcuate arm 23, the arm being maintained in position upon the studl by a wing nut 24. The free end of this arm 45 mounts a standard 25 bearing a slitter wheel` 26. This slitter wheel may be equipped with any suitable spring tensioning device such as is commonly incorporated in devices of this characterk to maintain engagement of the wheel with the 50 associated slitter disc II. As at present shown, the wheel is urged in the direction of the arrow A, Fig. 4, by a spring 21 acting upon the shaft 28 upon which this wheel is mounted through a lever 29; any other suitable construction accomplish- 55 drawn position, illustrated in dotted lines in Fig.

5, by simply withdrawing the same until the pin 35 may be rotated to engage the end surface of the lug 36 on collar 3i in which this latch is mounted. Retention of the pin in its withdrawn position may be insured by notching the end sur-` face of the lug, as indicated at 3l', if so desired.

Mounted above and slightly to the front of bar I3 is a reciprocable shaft 38, one end of which is mounted in a suitable guide 39, so constructed as to permit a slight Vertical play of the shaft. The opposite end of this bar has connected thereto a shifting means f-ii, so constructed as to loch the bar at either limit of its shifting movement. As at present shown, this shifting mechanism is illustrated as a toggle il operated through a counterweighted crank. ft2' secured to a shaft which is rotatably mounted in a bracket i6 secured to bar i3. Any other suitable means may, howevenbe provided for controlling movement of the bar.

The collars 3i are each provided with a clamping arm 45 in which is secured a yoke 36 strad-v dling the shaft 38 and bearing a collar il surrounding the' shaft and adapted to be clamped thereto as by means of Wing screw 43. The clamping arm is preferably formed in sections which, upon separation, will free yoke i6 and permit swinging movement of the slitters in the direction of arrow B Figure 5, when the clamping nut t9 of the bracket I6 has been released, thus enabling the slitter mechanism to be swung outwardly and permit release of the slitter wheel standard 25 when it becomes necessary to replace the same for any reason. f

The arcuate arm 23 has a pair of lugs 53, 5i, th-e lug 5! having an adjusting set screw 52 directedv therethrough and adaptedto engage the nger 2Q of bracket i6, and serving to limit the extent of engagement of the slitter wheel 26 with its associated slitter disc Il. Lugs 53 serve the purpose of limiting the upward swinging movement of the wheel-bearing arm and constitute merely a safety device to prevent over-manipulation of shaft 38.

In operation of the machine, during the actual slitting operation, the intermediate slitters occupy the position shown in Figure 2, which figure, with Figure 2a shows opposite ends of the machine between which any number of intermediate slitters may be disposed.

Assuming that it becomes necessary to change the widths of the paper being cut from the web l2, toggle mechanism l0 is rst manipulated to throw all of the intermediate slitters which are in operation from the position shown in Fig. 2-

to that shown in Fig. 2a, this being accomplished by movement of the handle element controlling the toggle from its dotted-line position in Figure 2a to its solid-line position in that iigure. This having been done, the entire Width of web may be threaded through the slitter and connected to the winding shaft as a unit, insuring uniform tension in the sheet and greatly facilitating the operation of connecting to the winding shaft as compared with the ordinary type of machine in the toggle mechanism to its dotted-line position,

at which time all intermediate slitters which are to go intoservice will be moved .to the position shown in Figure 2. When it is desired to render any selected intermediate slitter temporarily inoperative, it is only necessary to shift shaft 33 to the left, which Yraises all of the operative intermediate slitters out of the path of the paper, then clamp the wing nut 24 and release the pin 33 of the selected slitter. This will free collar 3i, permitting this collar to oscillate idly as shaft 38 is shifted to place the remaining slitters in operation. To return the inoperative slitter to operation, the shaft 38 is again shifted to the left, moving all of the operative slitters to the inoperative position and thereafter re-engaging thek pin 33 of the inoperative slitter.`

It will be obvious that with a construction of of many forms which my invention may assume,4

I do not wish to be understood as limiting myself thereto except as hereinafter claimed.

I claim:

l. In a slitter of the type described, a plurality of discs over which a sheet to be slit is adapted to pass, a support thereabove, a plurality of slitter mechanisms carried by the support and each embodying a slitter wheel for coaction with one of the discs, said mechanisms-each including a pivoted support for the slitter wheel whereby said wheels mayV be moved into and out of engagement with said discs and ak sheet passing thereover, in a plane generally paralleling the axes of said discs and means to simultaneously move said pivoted supports to engage said slitter wheels with or disengage said slitter wheels from the discs and a sheet passing thereover.

2. In a slitter of the type described, a plurality of discs over which a sheet tobe slit is adapted to pass, a support thereabove, a plurality of slitter mechanisms carried by the support and each embodying a slitter wheel for coaction with one of the discs, said mechanisms each including a pivoted support for the slitter wheel whereby said wheels may be moved into and out o-f engagement with said discs and a sheet passing-` thereover, means to simultaneously move said pivoted supports, and means to individually secure said pivoted supports against movement by said moving means.

3. In a slitter of the type described, a plurality of discs over which a sheet to be slit is adapted to pass, a rotatable shaft on which the discs are adjustably mounted, a stationary bar paralleling the shaft, a plurality of slitter mechcure said pivoted supports against movement by said moving means.

4. In a slitter of the type described, a plurality of discs over which a sheet to be slit is adapted to pass, a support thereabove, a plurality of slitter mechanisms Icarried by the support and each embodying a slitter wheel for coaction with one of the discs, said mechanisms each including a pivoted support for the slitter wheel whereby said wheels may be moved into and out of engagement with said discs and a sheet passing thereover, means to simultaneously move said pivotedy supports, and means to individually secure said pivoted supports against movement by said moving means comprising a member oscillatable about the pivot of each support, an operative connection between the moving member and said oscillatable members, releasable means to connect the oscillatable members to their respective pivoted supports and means to rigidly secure the pivoted supports to the pivots thereof.

' 5. In a slitter of the type described, a plurality 'of discs over which a sheet to be slit is adapted to pass, a rotatable shaft on which the discs are adjustably mounted, a stationary bar paralleling the shaft, a plurality of slitter mechanisms carried by the bar and each embodying a 4slitter wheel for coaction With one of the discs, said mechanisms each including a bracket adjustably se-cured to the bar and a support for the slitter wheel pivoted to the bracket whereby said wheels may be moved into and out of engagement with said discs and a sheet passing thereover, means to simultaneously move said pivoted supports, and means to individually secure said pivoted supports against movement by said moving means comprising a member oscillatable about the pivot of each support, an operative connection between the moving member and said oscillatable members, releasable means to connect the oscillatablev members to their respective pivoted supports and means to rigidly secure the pivoted supports tol the pivots thereof.

6. In a slitter of the type described, a plurality wheel for coaction with one of the discs, said.

mechanisms each including a bracket adjustably secured to the bar and a support for the slitter wheel pivoted to the bracket for movement in a plane substantially parallelto the shaft axis whereby said Wheels may be moved into and out of engagement with said discs and a sheet passing thereover, and means to simultaneously move said pivoted supports to engage said slitter wheels with or disengage said slitter Wheels from the discs and a sheet passing thereover.

'7. In a slitter of the type described, a plurality of discs over which a sheet to be slit is adapted to pass, a rotatable shaft on which the discs are adjustably mounted, a stationary bar paralleling the shaft, a plurality of slitter mechanisms car- .ried by the bar and each embodying a slitter wheel forrcoaction with one of the discs, said vmechanisms each including a bracket adjustably secured to the bar and a support for the slitter wheel pivoted to the bracket for movement in a plane substantially parallel to Athe shaft axis whereby said Wheels may be moved into and out of engagement with said discs and a sheet passing thereover, and means to simultaneously move said pivoted supports comprising a reciprocable shaft operatively connected to said pivoted supports, means to shift said shaft and means tohold the shaft in adjusted positions.

8. In a slitter of the type described, a plurality of discs over which a sheet to be slit is adapted to pass, a rotatable shaft' on which the discs are adjustably mounted, a stationary bar paralleling the shaft, a plurality of slitter mechanisms carried by the bar and each embodying a slitter wheel for coaction with one of the discs, said mechanisms each including a bracket adjustably secured to the bar and a support for the slitter wheel pivoted to the bracket for movement in a plane substantially parallel to the shaft axis whereby said Wheels may be moved into and out of engagement with said discs and a sheet passing thereover, means to simultaneously move said pivoted supports, and means to individually secure said pivoted Supports against movement by said moving means.

9. In a slitter of the type described, a plurality of discs over which a sheet to be slit is adapted to pass, a rotatable shaft on which the discs are adjustably mounted, a stationary bar paralleling the shaft, a plurality of slitter mechanisms carried by the bar and each embodying a slitter Wheel for coaction with one of the discs, said mechanisms each. including a bracket adjustably secured to the bar and a support for the slitter Wheel pivoted to the bracket for movementl in a plane substantially parallel to the shaft axis whereby said wheels may be moved into and out of engagement with said discs and a sheet passling thereover, and means to simultaneously move said pivoted supports comprising a reciprocable shaft operatively connected to said pivoted supports, means to shift said shaft, means to hold the shaft in adjusted positions, and means to individually secure said pivoted supports against movement by said moving means.

10. A slitter comprising a rotatable disc, a bar paralleling the axis of the disc, a pivot on said bar and disposed in a plane perpendicular to the axis of the disc, an arm mounted on said pivot and bearing a slitter Wheel for engagement with the disc, a member mounted for oscillation about the same axis as the arm, releasable means connecting said arm and member, means to oscillate said member, and means to hold said member in adjusted positions'.

11. A slitter comprising a rotatable disc, a bar paralleling the axis of the disc, a pivot on said bar and disposed in a plane perpendicular to the axis of the disc, ran arm mounted on said pivot and bearing a slitter Wheel for engagement with the disc, a member mounted for oscillation about the same axis as the arm, releasable means connecting said arm and member, means to oscillate said member, means to hold said member in adjusted positions, 4and. means to clamp Said arm against rotation about said pivot.