US3152500A

US3152500A - Paper web slitter

Info

Publication number: US3152500A
Application number: US156835A
Authority: US
Inventors: Russell E Watts
Original assignee: FLEMING AND SONS Inc
Current assignee: FLEMING AND SONS Inc
Priority date: 1961-12-04
Filing date: 1961-12-04
Publication date: 1964-10-13
Anticipated expiration: 1981-10-13

Description

Oct. 13, 1964 R. E. WATTS PAPER WEB SLI'ITER Filed Dec. 4, 1961 m 5 m 02 9 2 I 0. 4! 3 0 3 2 2 IO 7N. 4 4, W M F 3. E p g .Bv .Wu 3 m R 0 a l a g 0 M M ll; (I. o a H. a 70 0 o 1 ATTORNEYS United States Patent 3,152,500 PAPER WEB SLITTER Russell E. Watts, Dallas, Tex., assignor to Fleming & Sons, Inc., Dallas, Tex., a corporation of Texas Filed Dec. 4, 1961, Ser. No. 156,835

6 Claims. (Cl. 83-302) 7 This invention relates to new and useful improvements in paper web slitters and more particularly to means for cleaning the slitted edges of paper webs.

In the production of paper of narrow widths, it is customary to conduct paper of wide widths through a cutting or slitting machine having a plurality of cutter blades or slitter wheels for slitting the paper longitudinally as it is unwound from a roll and wound in another roll. This slitting of the paper creates a considerable amount of loose fibers, fuzz or hairs on the slit edges which are objectionable and interfere with the subsequent use of the narrow paper webs, particularly, when said paper is fibrous and of the type employed in the manufacture of spiralled cylinders and tubes. When glue or other adhesive is applied to the narrow webs, the loose fibers are removed from the slit edges by the applicator and collect in the adhesive container or glue pot whereby it is necessary to frequently clean said container with consequent waste of adhesive, loss of time and increase of labor. Heretofore, the loose fibers have been removed from the slit edges of the narrow paper websby compressed air, suction, sanding or brushing after said webs have been wound in rolls. Manifestly, this method of cleaning is inefiicient and expensive.

Accordingly, one object of the invention is to provide improved means for economically cleaning the slit edges of paper webs during the cutting thereof so that said edges are free from loose fibers, fuzz or hairs.

Another object of the invention is to provide an improved apparatus for cleaning the slit edges of paper webs be removing the loose fibers from said edges immediately after cutting of said paper webs and before winding thereof in a paper slitter.

A particular object of the invention is to provide an improved apparatus, of the character described, wherein a plurality of circular cleaning blades having sharp teeth on both sides of their peripheral portions are mounted in the planes of the slitter wheels of a paper slitter and are rotated relative to the paper webs whereby the teeth engage the slit edges of said webs and strip loose fibers therefrom.

A further object of the invention is to provide an improved apparatus, of the character described, wherein the rotary cleaning blades are of greater width than the slits between the paper webs so as to ensure the stripping of fibers from the edges of both webs adjacent each slit.

Another object of the invention is to provide an improved apparatus, of the character described, wherein the teeth of each cleaning blade are formed by diagonally slotting the periphery of the blade so as to dispose the same number of teeth on each side of said blade and to permit reversal of said blade when its teeth become worn.

A construction designed to carry out the invention will be hereinafter described, together with other features of the invention.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawing, wherein an example of the invention is shown, and wherein:

FIG. 1 is a side elevational View, partly in section, of a paper slitter having cleaning means constructed in accordance with the invention,

FIG. 2 is an enlarged, top plan view of one of the cleaning blades and its mounting.

FIG. 3 is an enlarged, transverse, vertical, sectional 3,152,500 Patented Oct. 13, 1964 view, taken on the line 3-3 the blade-s,

FIG. 4 is an enlarged, side elevational view of one of the blades, and

FIG. 5 is an enlarged, plan view, taken on the line 55 of FIG. 4.

In the drawings, the numeral 10 designates the frame of a paper slitter having a horizontal shaft 11 at its lower, rear portion for supporting a roll 12 of paper to be slit and means 13 at its upper portion for adjustably supporting and winding the paper in rolls 14 after it has been slit. The construction of the adjustable supporting and winding means 13 is more or less conventional. In traveling through the slitter from the roll 12 to the rolls 14, the paper web 15 passes over a rear roll 16, beneath a pair of contiguous rolls 17 and then around a front roll 18 which are rotatably mounted on the frame 10. A plurality of circular, cutter blades or slitter wheels 19 is rotatably mounted on the frame below and forwardly of the front roll 17 with the peripheries of the wheels engaging said roll for longitudinally slitting the paper web 15 as it passes therebetween. The slit web travels beneath and then over, or around, the roll 18 to the rolls 14. Although only one of the slitter wheels 19 is shown, it is noted that any suitable number thereof may be employed. As pointed out hereinbefore, the slit edges of the narrow paper webs are fuzzy and have loose fiber-s or hairs which cause clogging of the glue pots when glue or other adhesive is applied to said webs in the manufacture of spiralled cylinders and tubes.

In order to remove the loose fibers from the slit edges of the narrow paper webs, a horizontal shaft 20 is rotatably mounted on the frame 10 above the web 15 and between the rolls 17 and 18 for supporting a plurality of circular, cleaning blades 21 in the vertical planes of the slitter wheels 19. One cleaning blade 21 is provided for each slitter wheel and has a portion of its periphery in alinement with a portion of the periphery of the wheel. An endless belt and pulley drive connection 22 extends between the shaft 20 and an electric motor 23 for rotating the cleaning blades in a clockwise direction counter to the travel of the lower flight of the web 15 or in the same direction at a speed greater than said travel. The cleaning blades are of greater diameter than the slitter wheels and each blade is in the form of a flat disk having an axial opening 24 of relatively large diameter (FIG. 4). A circular hub 25 is provided for mounting each blade 21 on the shaft and the blades may be spaced apart in any suitable manner, such as by cylindrical spacers or sleeves 26 confined on said shaft between the hubs (FIGS. 2 and 3). Manifestly, the spacing between the blades is controlled by the length of the sleeves 26.

Each blade 21 is of greater thickness or width than the peripheral edge of each slitter wheel 19 and the slit 27 of the web 15 cut by the wheel whereby the sides of the peripheral portion of the blade engage both edges of said slit and spreads the same (FIG. 2). A plurality of equally-spaced, sharp, cutting teeth or

knife edges

28 and 29 is provided on both sides of the peripheral portion of the cleaning blade by a plurality of diagonal,

radial slots

30 and 31 cut in said peripheral portion. As shown most clearly in FIG. 5, the slots 30 extend at substantially right angles to the slots 31 therebetween so that the knife edges 28 of one side of the blade are staggered or offset relatively to the knife edges 29 of the opposite side. The slots extend at angles of approximately 45 relative to the axis of the blade whereby the knife edges remain sharp upon wear of the lateral surfaces of the blade. Also, oppositely-directed

knife edges

32 and 33 are prow'ded by the

slots

30 and 31 between the

edges

29 and 28, respectively, whereby the blade is reversible.

of FIG. 1, showing two of In operation, the cleaning blades 21 are rotated counter to the travel of the lower flight of the paper web 15 or in the same direction at a speed greater than said travel. The shaft 20 is positioned so that appreciable portions of the

knife edges

28 and 29 of the blades project through and below the slits 27 of the Web as shown in FIG. 3. The knife edges engage the edges of the slits and strip loose fibers, fuzz or hairs therefrom whereby said slit edges are substantially clean and smooth and the narrow webs of paper are ready for use when wound in rolls as shown at 14. In order to ensure uniform cleaning of the slit edges of the paper web, a horizontal member or bar 34 may underlie the narrow webs between the roll 18 and cleaning blade 21 so as to support said webs in a common horizontal during the cleaning of said edges.

The foregoing description of the invention is explanatory thereof and various changes in the size, shape and materials, as well as in the details of the illustrated construction may be made, within the scope of the appended claims, without departing from the spirit of the invention.

What I claim and desire to secure by Letters Patent is:

1. The combination in a paper web slitter having at least one rotatable slitting wheel and wherein a paper web is fed from a roll, slit by the slitting wheel and rerolled on at least one re-roll roll, the slitting wheel being disposed intermediate the rolls, of means for cleaning simultaneously both slit edges of the slit paper Web including at least one rotatable circular blade having. a port-ion of its periphery alined with the periphery of the slitting wheel, knife edges on both sides of the peripheral portion of the blade and disposed each in a plane extending at a right angle to the axis of rotation of said blade for engaging the slit edges to strip loose fibers therefrom as the paper web moves from the slitting wheel into engagement with said blade, and means for rotating aid blade to establish relative movement between said blade and the paper web to effectuate said loose fiber stripping action.

2. The combination set forth in claim 1 wherein the knife edges are equally spaced and the knife edges on one side of the blade are staggered relative to the knife edges on the opposite side of said blade.

3. The combination set forth in claim 1 including a member adjacent the circular blade and extending transversely of the periphery thereof for supporting the slit paper web in a common plane to ensure uniform cleaning of its slit edges.

4. The combination set forth in claim 1 wherein the circular blade is of a thickness greater than the space between the slit edges of the slit paper web so as to ensure the stripping of fibers from both of said edges.

5. The combination set forth in claim 1 wherein the knife edges of the blade are formed by diagonal slots in the periphery of said blade and extending entirely thereacross.

6. The combination set forth in claim 5 wherein the diagonal slots of the blade extend at substantially right angles to adjacent slot and at angles of approximately to the axis of said blade.

References Cited in the file of this patent UNITED STATES PATENTS 29,982 Mason Sept. 11, 1860 33,260 Moller Sept. 10, 1861 283,372 Brainard Aug. 21, 1883 417,854 Berry Dec. 24, 1889 1,651,305 Wagner Nov. 29, 1927 2,382,257 Ramsay Aug. 14, 1945 2,400,527 Aycock May 21, 1946 2,465,058 Burkett Mar. 22, 1949 FOREIGN PATENTS 894,763 Germany Oct. 26, 1953 777,891 Great Britain June 26, 1957

Claims

1. THE COMBINATION IN A PAPER WEB SLITTER HAVING AT LEAST ONE ROTATABLE SLITTING WHEEL AND WHEREIN A PAPER WEB IS FED FROM A ROLL, SLIT BY THE SLITTING WHEEL AND REROLLED ON AT LEAST ONE RE-ROLL ROLL, THE SLITTING WHEEL BEING DISPOSED INTERMEDIATE THE ROLLS, OF MEANS FOR CLEANING SIMULTANEOUSLY BOTH SLIT EDGES OF THE SLIT PAPER WEB INCLUDING AT LEAST ONE ROTATABLE CIRCULAR BLADE HAVING A PORTION OF ITS PERIPHERY ALINED WITH THE PERIPHERY OF THE SLITTING WHEEL, KNIFE EDGES ON BOTH SIDES OF THE PERIPHERAL PORTION OF THE BLADE AND DISPOSED EACH IN A PLANE EXTENDING AT A RIGHT ANGLE TO THE AXIS OF ROTATION OF SAID BLADE FOR ENGAGING THE SLIT EDGES TO STRIP LOOSE FIBERS THEREFROM AS THE PAPER WEB MOVES FROM THE SLITTING WHEEL INTO ENGAGEMENT WITH SAID BLADE, AND MEANS FOR ROTATING SAID BLADE TO ESTABLISH RELATIVE MOVEMENT BETWEEN SAID BLADE AND THE PAPER WEB TO EFFECTUATE SAID LOOSE FIBER STRIPPING ACTION.