US3262699A

US3262699A - Sheet control device

Info

Publication number: US3262699A
Authority: US
Inventors: William E Aschenbrenner
Original assignee: Consolidated Papers Inc
Current assignee: NewPage Wisconsin System Inc
Priority date: 1964-08-13
Filing date: 1964-08-13
Publication date: 1966-07-26
Anticipated expiration: 1983-07-26

Description

July 26, 1966 w. E. ASCHENBRENNER 3,262,699

SHEET CONTROL DEVICE 2 Sheets-Sheet 1 Filed Aug. 13, 1964 R O T N E V m J y 1966 w. E. ASCHENBRENNER 3,

sasn'r CONTROL Davies 2 Sheets-Sheet 2 Filed Aug. 13, 1964 United States Patent 3,262,699 SHEET CONTROL DEVICE William E. Aschenbrenner, Wisconsin Rapids, Wis., assignor to Consolidated Papers, Inc., Wisconsin Rapids, Wis., a corporation of Wisconsin Filed Aug. 13, 1964, Ser. No. 389,262 8 Claims. (Cl. 271-45) The present invention relates to means for facilitating the forward movement of individual sheets cut from a continuous web.

The invention is particularly concerned with improvements in apparatus for cutting continuous webs of paper into sheets and moving them forwardly in a smooth continuous manner at high speeds, and wherein sheets are intermittently, by sampling means, caused to be diverted from the main path of movement to a secondary path.

In one specific embodiment the present invention relates to means for adjustably controlling the frictional engagement or pressure between opposed conveyor surfaces which initially receive and move forwardly a newly severed individual sheet, with the object of preventing the sheet from being drawn away from the cutting knife too quickly and to prevent whipping, which might crumple the trailing edges of the sheets, cause them to curl, or jam up, and otherwise prevent smooth continuous operation.

In another specific embodiment the present invention relates to means, correlated to the aforesaid sampling means, for preventing tendency of the forwardly moving sheets to inadvertently move into the sampling path, particularly when the sheets are somewhat curled due to having been cut from near the end of the supply roll, with the object of thereby facilitating smooth sheet passage in the desired direction and permitting the cutting operation to be conducted at high uniform speed.

The foregoing objects and advantages, details of construction and arrangement of parts and the economies thereof will be apparent from a consideration of the following specification and accompanying drawings wherein:

FIG. 1 is a diagrammatic side elevational view of the apparatus of the present invention.

FIG. 2 is a perspective view of a portion of the apparatus shown in FIG. 1, with added details.

FIG. 3 is a relatively enlarged fragmentary detail view of adjustment means for one of the rolls shown in FIGS. 1 and 2, and

FIG. 4 is a section on the line 44 of FIG. 3.

Referring to the drawings, the reference numeral indicates a forwardly moving paper web, drawn and moved forwardly from a supply roll 'by conventional means, not shown. In its forward passage, the web 10 is intermittently cut into sheets of predetermined length by means of the radial fly knife component 11 on the driven roll 12 meeting the fixed or bed-knife component 13 on the holder 14.

The resulting severed sheet 15 is then deposited on and moved forwardly by the spaced series of conveyor belts or tapes 16

embracing rolls

17 and 18, one of which is driven. The sheet 15 is thus carried forward by the spaced conveyor tapes 19 which are intermeshed with tapes 16, the tapes 19 being driven in the direction as shown by the arrows and passing in part around

rolls

20, 21 and 22.

Disposed in juxtaposition to the upper run of tapes 19 is a separate series of tapes 23 caused to move about the

rolls

24 and 25 the, direction indicated, one of said rolls being driven. The

tapes

23 and 19 between them frictionally grip the sheet 15 and move it forwardly at a speed generally greater than the speed of the web 10, and then pass the sheets over the sample gate 26 and between the conveyors 27 and 28.

3,262,699 Patented July 26, 1966 Intermittently, and as more fully described and claimed in the co-pending application of William J. Haselow, Serial No. 89,383, filed February 15, 1961, now Patent Number 3,180,190, the sampling gate 26 is caused to move to the dotted position shown in FIG. 1, whereupon a sheet 15 is deflected downwardly onto tapes 19 and to and between the tapes 19 and conveyor belt or tapes 29.

Although the sheets 15 normally pass above the gate 26 when it is tilted downwardly as shown in the full line position of FIG. 1, when the sheets become curled for some reason, and particularly when they are severed from near the end of the supply roll, there is a tendency for the sheets to follow down and around roll 27 and under the adjacent edge of gate 26. In order to prevent this, I provide air pressure by means of the pipe 30 disposed parallel to roll 27 having longitudinally spaced vents adapted to blow air in the narrow space between roll 27 and the adjacent edge of gate 26, against the underside of a passing sheet 15. This tends to prevent accidental and unwanted downward movement of sheets 15 and permits increase in the speed of operation of approximately feet per minute, particularly due to the fact that the cutter does not have to be slowed up near the supply roll end.

Air is supplied by the air source line 31 controlled by shut-off valve 32, and through filter 33, pressure control valve 34, and electric solenoid valve 35 to air distribution pipe 30. The electric solenoid valve 35 is so connected that when the gate 26 is opened, (i.e., tilted upwardly to the dotted line position) the air supply is automatically shut off, and when the gate 26 is closed or tilted downwardly the air automatically returns to the same pressure as before, which can be about eighty pounds per square inch.

Control of frictional engagement of a cut sheet 15 as it passes between

belts

19 and 23 can be accomplished by adjusting the spacing of roll 25 and its carrier straps 23 in relationship to the straps 19. For this purpose the shaft 36 of roll 25 is journalled in flanged bearing 37 which is releasably secured by means of bolts 38, extending through the slot 39 in the frame wall 40, to the sliding rack 41. Upon loosening of bolts 38, and the tightening screw 43 by means of lever 44, the rack 41 can be moved parallel to slot 39 and the spacing of roll 25 and its straps 23 adjusted as to distance from or pressure against belts 19. For ease of such adjustment a pinion 42 meshes with rack 41. The pinion 42 is pivotally carried by the frame wall 40 by means of the screw 43, and is provided with a handle or lever 44. Adjustment is made by manipulating the knurled flange 45 manually or the angular elongated shank 45 by means of a wrench. Although adjustment means have been shown on one side of roll 25 it will be understood that similar adjustment means are provided on the opposed side.

In this manner adjustment can be made as to the nip between roll 25 and its tapes with the tapes 19 to provide for different conditions of operation, speeds, sheet thickness. Raising of the roll 25 permits the sheet 15 to retain a natural position as distinguished from possible whipping as might be the case if pressure is too great when the roll 25 is too low and the sheet 15 pulled away from the

knives

11 and 13 too quickly.

It will be noted from FIG. 3 that the slot 39 is inclined to the vertical as shown. However, the slot 39 is disposed normal to a plane passing through the axes of

rolls

24 and 25. By reason of this the tension on the embracing tapes 23 remains substantially constant upon upward or downward adjustment of roll 25 in the manner aforesaid.

Although I have shown and described the preferred embodiment of my invention it will be understood by those skilled in the art that changes may be made in the details thereof without departing from its scope as comprehended by the following claims.

.I claim:

1. Apparatus for conveying sheets of material from a rotary cutter comprising a first endless belt conveyor disposed about a plurality of rollers, a second juxtaposed endlas belt conveyor disposed about a pair of rollers and means for moving one of said pair of rollers in a direction normal to a plane passing through the axes of said pair ofrollers for adjustably controlling the proximity of said conveyor belts.

2. Apparatus for conveying sheets of material from a rotary cutter comprising a first endless belt conveyor disposed about a plurality of rollers, a second juxtaposed endless belt conveyor disposed about a pair of rollers and inclined to said first conveyor and forming a nip therewith, and means for moving one of said pair of rollers in a direction normal to a plane passing through the axes of said pair of rollers for adjustably controlling the bite of-said nip whereby a newly severed individual sheet drawn away from the cutter is prevented from being drawn away too quickly and to prevent whipping thereof.

3. Apparatus for conveying sheets of material from a rotary cutter comprising a first endless belt conveyor disposed about a plurality of rollers, a second juxtaposed endless belt conveyor disposed about a pair of rollers and inclined to said first conveyor and forming a nip therewith, and means for adjusting the bite of said nip cmprising means engaged with one of the rollers carrying said second conveyor for adjusting the proximity of said second conveyor in a direction normal to a plane passing through the axes of said pair of rollers, as it passes about said one roller, with respect to said first conveyor belt.

4. Apparatus for conveying sheets of material from a rotary cutter comprising a first endless belt conveyor dis posed about a plurality of rollers, a second endless belt disposed about a pair of rollers and above said first belt and inclined thereto in a forwardly direction, and means for adjusting the degree of inclination of said second belt to the first belt comprising rack and pinion means for moving the one of said pair of rollers closest to said first conveyor in a direction normal to a plane passing through the axes of said pair of rollers.

5. Apparatus for conveying sheets of material from a rotary cutter comprising a first endless belt conveyor disposed about -a plurality of rollers, a second endless belt disposed about a pair of rollers and above said first belt and inclined thereto in a forwardly direction, and means for adjusting the degree of inclination of said second belt to the first belt comprising means for moving the one of said pair of rollers closest to said first conveyor in a direction normal to a plane passing through the axes of said pair of rollers.

6. Apparatus for conveying sheets of material from a rotary cutter comprising a first endless belt conveyor composed of a plurality of spaced straps disposed about a plurality of rollers and changing direction about one of said rollers from a substantially horizontal to a substantially downward inclined direction, means for preventing a sheet disposed on the horizontal portion of said conveyor from following its downward inclination, a second conveyor belt disposed about a pair of rollers and above and inclined to the horizontal portion of said first conveyor and forming a nip therewith, and means for adjusting the bite of said nip and means for adjusting the degree of inclination of said second belt to the first belt comprising means for moving the one of said pair of rollers closest to said first conveyor in a direction normal to a plane passing through the axes of said pair of rollers.

7. The apparatus of claim 5 further comprising means for preventing a sheet disposed on the horizontal portion of said first conveyor from following its downward inclination.

8. The apparatus of claim 5 further including means for preventing a sheet disposed on the horizontal portion of said conveyor from following its downward inclination comprising air jet means disposed inwardly of said conveyor and adjacent to said direction-changing roller for directing jets of air against the under surface of said sheet.

References Cited by the Examiner UNITED STATES PATENTS 2,427,223 9/1947 Moore 83-106 2,761,633 9/1956 Sindzinski.

2,819,079 1/ 1958 Beaulieu 271-76 2,863,663 12/1958 Richards 271-69 2,901,250 8/1959 Martin 271-76 X 3,180,190 4/1965 Haselow 83-88 M. HENSON WOOD, JR., Primary Examiner. J. N. ERLICH, Assistant Examiner.

Claims

1. APPARATUS FOR CONVEYING SHEETS OF MATERIAL FROM A ROTARY CUTTER COMPRISING A FIRST ENDLESS BELT CONVEYOR DISPOSED ABOUT A PLURALITY OF ROLLERS, A SECOND JUXTAPOSED ENDLESS BELT CONVEYOR DISPOSED ABOUT A PAIR OF ROLLERS AND MEANS FOR MOVING ONE OF SAID PAIR OF ROLLERS IN A DIRECTION NORMAL TO A PLANE PASSING THROUGH THE AXES OF SAID PAIR OF ROLLERS FOR ADJUSTABLY CONTROLLING THE PROXIMITY OF SAID CONVEYOR BELTS.