US2651836A - Core cap remover - Google Patents

Description

Sept. '15, 1953 G. w. WALLENIUS CORE CAP REMOVER Filed March 14, 1951 s Sheets- She't 1 1N VEN TOR. George BY I Qgwf.

Sept K5,, 1953 s. w. wALLENius CORE CAP REMOVER 5 Sheets-Sheet 2 Filed March 14, 1951 Q Q?" INVENTOR. @orge mlwiferzzw WM NW% 7 Sept 15,. 1953 e. W. WALLENIUS CORE CAP REMOVER 3 Sheets-Sheet 3 Filed March 14, 1951 JNVENIOR. emye Wiizz BY Patented Sept. 15, 1953 UNITED STATES PATENT OFFICE CORE CAP REMOVER George W. Wallenius, Turners Falls, Mass, as-

signor to International Paper Company, New York, N. Y., a corporation of New York Application March 14, 1951, Serial No. 215,533

3 Claims. 1

This invention relates to new and useful improvements in the removal of caps or tips from paper cores, and particularly seeks to provide novel apparatus for removing the caps from paper cores in such a manner that the caps will not be damaged and can be reused.

Heavy paper cores are used throughout the paper industry as the winding centers for paper rolls. Metal caps are forced tightly onto the core ends, and an indentation of the cap meshes into a slot in the core so that the core will not turn within the cap. The indentation in the cap is further used to receive a key from the winding mechanism to transmit driving power to the core.

The paper cores are long and cumbersome to handle in shipment or storage so that reuse is seldom practiced. However, the core caps are relatively small so that shipping or storage problems are minute compared to the cores, making it desirable to reuse them if a method to remove the caps from the cores is economically feasible.

Heretofore the practice has been either to discard the used cores and caps or to separate the core stubs with the caps and collect them for reuse. In the latter case a collection of core stubs and caps is made and ignited in the open. After the paper core is burned or charred sufficiently the remainder of the core is removed from the cap manually. Two serious disadvantages in this method have arisen. First, since the cores are thick and tightly wound they are difficult to ignite even with an independent fuel. Second, some damage is invariably done to the caps so that generally a cap cannot be reused after two or three burnings. This leads to further waste because the efficiency of the operation will generally be below 70% on each such recovery.

Therefore it is an object of this invention to provide a core cap remover which will effect the removal of core caps from core stubs in undamaged condition for reuse.

is also an object of this invention to provide a core cap remover in which manual labor is reduced to a minimum.

It is another object of this invention to provide a core cap remover of the character described which includes pins to hold the core, to insert the pins in the core, and a plunger to force the cap from the core.

It is a further object of this invention to provide a core cap remover of the character described, including a clamping ring, radially extending movable pins carried by the clamping ring, compression springs mounted on the pins,

and engaged against portions of the clamping ring to retract the pins, a cam ring to control the movement of the pins, and cam grooves located in the cam ring, each groove corresponding to a pin so that rotation of the cam ring causes a radial movement of the pins.

Another object of this invention is to provide a core cap remover of the character described in which the plunger body fits snugly within thecore body, a plunger tip fits snugly within the cap and the intervening plunger shoulder abuts against the edge of the cap.

A further object of this invention is to provide a core cap remover of the character described in which the plunger is driven forward by a doubleaction piston to force the cap from the core stub, the cap removed, and the plunger retracted by the piston to be in position to repeat the cycle.

With these and other objects in view, the nature of which will be more apparent, the invention will be more fully understood by reference to the drawings, the accompanying detailed description and the appended claims.

In the drawings,

Fig. 1 is a front end elevation, partly in sec tion, of a core cap remover constructed in accordance with this invention;

Fig. 2 is a vertical, longitudinal section thereof;

Fig. 3 is a vertical section similar to Fig. 2, but showing only the clamping assembly at the time a core cap is about to be removed from the core stub; and

Fig. 4 is a vertical section similar to Figs. 2 and 3 showing the core cap fully removed from the core stub.

Referring to the drawings in detail, this invention as illustrated is embodied in a core cap remover particularly adapted for removing metal caps from paper cores and utilizing compressed air through a double-acting piston and cylinder.

Integral with a mounting plate ID is a cylinder block H which contains in a cylinder bore !2 a piston l3 provided with a plurality of piston rings I l. A plunger [5 extends forward from the piston to a point where the core stubs are to be placed as described hereinafter. The rear end of the plunger l5 has a reduced end It which fits through an opening in the center of the piston l 3 and is secured to the piston by a nut l1. Attached to the front of the cylinder block by a plurality of bolts l8 and nuts 19 is a cylinder head 25 which is provided with an extension 2| that fits closely around the plunger l5. The annular recess in the'cylinder head 20 defined by the extension 2i and the plunger 15 is lined with strips or" packing 22 which are held in position by an adjustable gland 23 secured to the cylinder head by a plurality of studs 24 and nuts 25. The cylinder block is provided with a forward air inlet 26 and a rear air inlet 2'! which are connected to an air supply and control valve (not shown) of any type satisfactory to drive a double-acting piston. ihe cylinder head may be provided with an oil duct 23 which is closed with a plug 29. The oil duct may be used to lubricate the piston in the event that a lubricant should not be mixed with the air entering the cylinder. The mounting plate IE! is mounted on a suitable supporting base (not shown).

Extending forward from the cylinder head is another series of relatively long studs 30 and a clamping ring 3i is attached thereto by a plurality of bolts 32 threaded into the respective studs through an extension 33 of the clamping ring 3|. The forward portion of the clamping ring is of reduced diameter to define a peripheral shoulder upon which is movably mounted a cam ring 34. The inner surface of the cam ring 34 which is adjacent the outer surface of the clampin ring 3! is provided with a plurality of rounded cam grooves 35 which are spirally disposed with respect to the ring centers. Each groove 35 is provided with an arcuate slot 35a (see Fig. 2) to facilitate the positioning or removal of the cam ring as on the extension 33 of the mounting ring. The outer surface of the cam ring 3d is provided with a plurality of extensions 33, each of which is provided with a socket 37 to receive a removable turning lever 38. A locking ring 39 is secured to the clamping ring 3| by a plurality of bolts 48 and abuts against both the clamping ring 3! and cam ring 34, holding the latter in position on the reduced diameter portion of the clamping ring. The locking ring 39 is generally tightened to the extent that the cam ring 34 is easily rtated with the lever but remains at rest when the operator discontinues the rotation.

The clamping ring 3| i provided with a plurality of radially disposed bores 4| including a reduced diameter portion adjacent the inner ring surface and a larger diameter portion adjacent the outer ring surface thus forming an intermediate shoulder 42. The bores are in register with and equal in number to the cam grooves 35 of the cam ring 34. Each bore and cam groove unit is provided with a movable pin generally indicated at 43 and which includes a pointed end 44, a body and an enlarged semi-spheroidal head 46. Each pin body 45 fits smoothly within the associated reduced bore portion while the pin head fits smoothly within the enlarged bore portion and also is engaged within the associated cam groove 35. A helical compression spring 41 is mounted on the pn body 45 and extends between the bore shoulder 42 and the expanded pin'head &5. When the pin is spring-retracted into the fullest depth of the cam groove 35 the pin point 44 is in alignment with the internal surface of the clamping ring 3 i.

Removably attached to the front of the plunger 55 by a bolt 48 is a plunger head 43, the front portion of which or plunger tip 50 is of slightly reduced diameter, thus forming a shoulder having a depth approximately equal to the wall thickness of the core caps to be removed as hereinafter described. The plunger head 43 will generally be fabricated from tool steel so that the shoulder El can withstand repeated usage.

In operation a core stub 52 which carries a cap 53 tightly attached is placed on the plunger as shown in Fig. 2. The plunger tip 50 fits snugly within the cap 53 while the remainder of the plunger head 49 fits snugly within the core stub 52 and the inner end 54 of the cap wall abuts against the shoulder 5| of the plunger head. The internal diameter of the clamping ring 3| is slightly larger than the outside diameter of the core stub 52 and cap 53 so that the core stub and cap can be easily placed within the ring. During this portion of the operation the cam ring 34 is set so that the deepest part of the cam grooves 35 are over the pin heads 46 and the pins 43 are spring retracted by the springs 41 so that the pin points 44 are even with the internal surface of the clamping ring 3|.

After placement of the core stub and cap on the plunger the cam ring 34 i rotated manually, by using the lever 33, toward the shallow end of the cam grooves 35. The pins 43 are thus cam-propelled towards the center and the pointed ends 44 pierce the core stub for a sufficient distance to hold it firmly, as shown in Fig. 3.

The piston I3 is then moved forward by allowing compressed air to enter the rear air inlet 2'! while air is allowed to exhaust through the forward inlet 25 to force the plunger 15 forward, thus forcibly sliding the cap 53 from its engagement with the core stub 52. The cap is then taken from the plunger tip 53 and the air controls are reversed to force the piston l3 and plunger l5 back to the initial position shown in Fig. 2.

The cam ring 34 is then returned to its resting position and the springs 41 are strong enough to retract the pins 43 from the core stub. Then the core stub is removed and the apparatus is ready to repeat the cycle.

Thus it will be seen that the invention herein disclosed provides a core cap remover wherein the core stub is securely clamped and a tightly fitted plunger forces the cap to be disengaged from the core without damage to the cap.

It is, of course, to be understood that various details of arrangements and proportions of parts may be modified within the scope of the appended claims.

I claim:

1. In a machine to remove internally skirted core caps from hollow cores, a stationary clamping ring provided with a plurality of radially disposed bores, a cam rin rotatably mounted on said clamping ring and provided with a plurality of inwardly disposed spiral cams numerically corresponding to and aligned with said bores, a plurality of pins provided with retracting springs mounted in said bores and projectable by said cams to firmly hold the end of the core in preparation for the removal of the cap therefrom, a plunger having a diameter substantially equal to the inside diameter of said core and receivable within the core held by said pins and being provided at its outer end with a portion of reduced diameter whereby to form an abutment shoulder engageable with the internal skirted portion of said cap, and means to reciprocate said plunger along the axis of said clamping ring.

2. In a machine to remove internally skirted core caps from hollow cores, a stationary clamping ring provided with a plurality of radially disposed bores, a cam ring rotatably mounted on said clamping ring and provided with a plurality of inwardly disposed spiral cams numerically corresponding to and aligned with said bores, a plurality of pins provided with retracting springs mounted in said bores and projectable by said cams to firmly hold the end of the core in prep aration for the removal of the cap therefrom, means to rotate said cam ring, a locking ring attached to said clamping ring to frictionally maintain set positions of said cam ring, a plunger having a diameter substantially equal to the inside diameter of said core and receivable within the core held by said pins and being provided at its outer end with a portion of reduced diameter whereby to form an abutment shoulder engageable with the internal skirted portion of said cap, and means to reciprocate said plunger along the axis of said clamping ring.

3. A machine to remove internally skirted core caps from hollow cores, comprising a base, a cylinder block fastened on said base and including a cylinder head, a double acting piston, a plunger attached to said piston and extending through said cylinder head, means for actuating said piston, and a clamping assembly attached to and extending beyond said cylinder head and including a clamping ring provided with a plurality of radially disposed bores, a cam ring rotatably mounted on said clamping ring and provided with 20 a plurality of inwardly disposed spiral cams numerically corresponding to and aligned with said bores, a plurality of pins provided with retracting springs mounted in said bores and projectable by said cams to firmly hold the end of the core in preparation for the removal of the cap therefrom, means to rotate said cam ring, rotation in one direction effecting propulsion of said pins inwardly toward the center and rotation in the opposite direction allowing said springs to retract said pins, and a locking ring attached to said clamping ring to frictionally maintain set positions of said cam ring, the plunger having a diameter substantially equal to the inside diameter of said core and receivable Within the core held by said clamping ring and being provided at its outer end with a portion of reduced diameter whereby to form an abutment shoulder engageable with the internal skirted portion of said cap.

GEORGE W. WALLENIUS.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 160,696 Morse Mar. 9, 1875 1,633,593 Larbalester -1 June 28, 1927 1,634,600 Thompson July 5, 1927 1,692,274 Malloy et a1. Nov. 20, 1928 1,819,973 Richardson et a1. Aug. 18, 1 1

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