US2696150A - Wound board machine - Google Patents

Description

Dec. 7, 1954 k J. TEMPERLEY 7 WOUND BOARD MACHINE Filed May 31, 1950 3 Sheets-Sheet 1 v I I nbenlor AW 7E? P519; 5 y

J. TEMPERLEY WOUND BOARD MACHINE 5 Sheets-Sheet 2 Filed May 31, 1950 Dec. 7, 1954 J. TEMPIERILEY 2,696,150

WOUND BOARD MACHINE Filed May 51, 1950 s Sheets-Sheet 3 Inventor 707w 7Zwpsm4ey Patented Dec. 7, 1954;

WOUND BOARD MACHINE John Temperley, Bury, England, assignor to Walmsleys (Bury) Limited, Bury, England Application May 31, 1950, Serial No. 165,21il

'Claims priority, application Great Britain June 8, 1949 3 Claims. (Cl. 92-67) This invention concerns cutting blades for wound board machines.

In such machines one, two or sometimes three, thinpaper webs are Wound on a forming or making-up roll until a predetermined thickness has been attained; thereafter the cylindrical thick sheet is cut across its width to enable it to be removed from this making-up roll. This cross-cutting has previously been effected manually by displacing a pointed or sharp instrument across the roll with its end guided in a transversely extending groove in the roll surface. Cutting has also been performed by a radially outward displacement of a cutter such as a wire or blade normally contained in a transverse groove in the roll.

Although the known methods of cutting the cylindrical sheet can be used whilst the roll is rotating, there is a definite limitation to the sheet thickness and this is, to some extent, related to the linear velocity of the sheet surface.

An object of the present invention is to enable relatively thick and/or wide sheets to be cut during rotation thereof especially at relatively high linear velocities.

The invention will be described further by way of example with reference to the accompanying drawings in which:

Fig. l is a left hand diagrammatic end elevation of a wound board machine,

Fig. 2 is a corresponding front elevation of the machine; and

Figs. 3 and 4 are fragmentary front elevations partly in section on an enlarged scale showing details of the left hand and right hand ends of the machine, respectively.

A making-up roll 11 is mounted on a shaft 12 carried in bearings 13 (Fig. 3) and 14 (Fig. 4).

A cam 15 is fixed on the shaft 12 near the left hand end thereof and another cam 16 is fixed to the shaft 12 near its right hand end. These earns 15 and 16 thus revolve with the roll 11.

A fixed cam 17 surrounding the shaft 12, is mounted adjacent to the rotary cam 15, and another fixed cam 18 is mounted adjacent to the rotary cam 16.

A blade 19 having spaced teeth 19a can be accommodated within a groove extending from end to end of the roll 11, so that, as shown in Fig. 1, the teeth do not project beyond the groove in a radially outward direction. The blade 19 is mounted on two rollers 20 which can roll in boxes 21, allowing the blade to move along the slot in the roll 11. Each box 21 is fixed to the outer end of a rod 22 which passes through a bore in a guide 23 carried by a bracket 24 fixed to the appropriate end face of the roll 11. Each rod 22 then passes through a coiled compression spring 25 and terminates in a clevis 26 carrying a roller cam follower 27.

The left hand follower 27 rolls around the surface of the fixed cam 17 when the roll 11 and the shaft 12 rotate; and likewise the right hand follower 27 rolls around the surface of the fixed cam 18.

it will be seen from the contours of these cams as illustrated in Fig. 1 that displacement of the followers 27 in a radially outward direction will take place once in every revolution of the shaft 12. This outward displacement causes compression of the springs 25 and outward movement of the rods 22 and therewith of the blade 19 by way of the boxes 21 and the rollers 20 to partially cut or perforate sheets of wet board on the forming or making-up roll .11. The springs 25 maintain the followers in contact with the cam surfaces and return the blade and associated parts back to the position shown in Fig. 2 after the cam lobes have been passed.

A ram 28 has its cylinder head pivoted on a bracket 29 fixed to the roll 11 and its piston rod pivoted to one arm of a bell-crank lever 30 mounted on a fulcrum pin 31 fixed to the bracket 24. The other arm of the bellcrank lever 30 is pivoted to the blade 19. The ram is connected to an axial bore 12a (Fig. 3) in the shaft 12 by way of a flexible pipe or hose 32. The left hand end of the shaft 12 is counterbored to receive components of a stuffing box providing a rotary seal around an air supply pipe 33 which is fixed.

If air is passed from the pipe 33 into the bore 12a and thence through the pipe 32 to the ram 28 the piston of the ram will be displaced. Such displacement swings the hell-crank lever clockwise (Fig. 2) and moves the blade 19 in a direction towards the right in Fig. 2, causing a cross cutting motion and severing of the Wet board on the make up roll 11. A tension spring 34 connected between the right hand end of the blade 19 and a lug on the roll 11 is extended on rightward displacement of the blade; this spring 34 reexerts itself when the air pressure to the ram is released, causing return movement of the parts to the position shown in Fig. 2. This movement of the blade to the right or to the left causes the rollers 20 to move within the boxes 21, which nevertheless define the radial position of the blade relative to the roll 11.

The air supply pipe 33 is connected to the outlet of a hand operated valve 35 of which the inlet is connected by way of a mechanically operated valve 36 to a source of air, S. The mechanical valve 36 is opened for a part of the revolution of the shaft 12 by actuating gear comprising a follower 37, a lever 38 pivotally connected at its ends to the lever 40 and to the operating arm illa of the valve 35.

The hand operated valve 35 is a two-way valve, capable of bringing the pipe 33 into communication with valve 36 which periodically delivers air under pressure, or with the atmosphere so as to release the air pressure in the ram 28.

If the hand operated valve 35 is moved to the position for supplying air to the ram, such air is only delivered over a portion of the rotation of the shaft 12 as defined by the cam 15 with which the follower 37 co-operates.

There is a bore 12b in the right hand end portion of the shaft 12 (Fig. 4). The outer end of this bore is counterbored to receive a concentric double rotary stuifing box assembly whereby a fixed pipe 41 is maintained in communication with the bore 12b and a fixed pipe 42 in communication with a pipe 43 which extends axially within the bore 12.) and revolves with the shaft 12. The pipe 43 is connected to the inlet of a valve 44 carried by the roll 11. The outlet of the valve 44 is connected by way of a pipe 45 to the bore 12b which is also connected by a conduit or pipe 46 within the roll 11 to a series of ports 11a disposed at spaced intervals adjacent to the blade 19 on the trailing side thereof.

The operating arm of the valve 44 is connected by way of a link 47 to one arm of a lever 48 fulcrurnmed at 49 on a pin carried by the right hand bracket 19b. The other arm of the lever 48 is coupled by a pin-and-slot connection to the right hand end of the blade 19.

The pipe 42 is connected by way of a mechanically operated valve 50 to the air supply S. The valve 50 is actuated by valve gear (not shown, but similar to that associated with the valve 36) driven by the cam 16.

The pipe 41 leads to the ram 51 (Fig. 1) of a pneumatically operated scraper mounted on a fixed bracket 52 and having a blade 53 which is displaceable, when air is supplied to the ram, in a direction towards the centre of the roll 11. If the roll 11 and hence the cam 16 is in such a position that the valve 50 is open, air under pressure can pass through the pipe 42, to the valve 44. The valve 44 is open when the blade 19 is displaced to the right from the position shown in Fig. 2, i. e. immediately after a cross cutting stroke of the blade 19. Under these conditions compressed air is supplied to the ports 11a through the pipe 45, the bore 12b and pipe 46, and to the scraper ram 51 through the pipe 41 which is in communication with the bore 12b.

The scraper 53 serves to detach the cut lengths of board from the make up roll 11 after these have been loosened by the air jets 11a.

1 claim:

1. An apparatus for cutting wound board comprising a making up roll mounted on a shaft, a groove in said roll, a blade in said groove parallel to said shaft, cams on said shaft pneumatic valves actuated by said earns, a manually operated pneumatic valve, a pneumatic ram connected to said blade to reciprocate it and means to cause said blade to project from said groove when it is reciprocated and to withdraw when it is not.

2. An apparatus as set forth in claim 1 in which said means to cause said blade to project and withdraw consists of a stationary cam of longer dwell than the cams on said shaft so that the transverse action of the blade is effected before it retracts radially.

3. An apparatus for cutting wound wet fibrous material sheets, comprising a making up roll, a transversely extending groove in said roll, a blade with spaced teeth mounted in said groove, a pneumatic ram connected to said blade to reciprocate said blade in'a direction parallel to its length, means to cause said blade to project from said groove, spring means to retract said blade, an air supply line to said ram, and a manually operated valve arranged in said supply line to actuate said ram.

References Cited in the file of this patent Number 5 353,555 465,427 713,361 978,587 1,001,896 10 1,016,945 1,127,807 1,459,041 1,590,167 1,608,129 15 1,665,834 1,797,448 1,825,250 1,986,212 2,010,078 0 2,030,684 2,355,006 2,396,104 2,509,047

Number UNITED STATES PATENTS Name Date Goss et a1. Nov. 30, 1886 Cox Dec. 15, 1891 Sundt Nov. 11, 1902 Hunt Dec. 13, 1910 Scooler Aug. 29, 1911 Lancey Feb. 13, 1912 Perkins Feb. 9, 1915 Widrner June 19, 1923 Howard June 22, 1926 MacAllister Nov. 23, 1926 Ayer Apr. 10, 1928 Sheldon Mar 24, 1931 Rehak Sept. 29, 1931 Mahon Jan. 1, 1935 Hall Aug. 6, 1935 Coleman Feb. 11, 1936 Millspaugh Aug. 1, 1944 Kingman Mar. 5, 1946 Sternpel May 23, 1950 FOREIGN PATENTS Country Date Austria July 1 1,

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