US2056380A - Core crimping machine - Google Patents

Description

Filed Sept 28, 1934 4 Sheets-Sheet l INVENTOR 50" fi/QCH/EHZO 6. HD4075 ATTORNEY Oct. 6, 1936. A. G. ADAMS ET AL 2,055,380

CORE CRIMPING MACHINE Filed Sept. 28, 1934 4 Sheets-Sheet 2 INVENTOR :41? C H/BELD 6. HOG/W5 JOSEPH BEETfl/A/ ATTORNEY Oct. 6, 1936. G ADAMS AL 2,056,380

CORE CRIMPING MACHINE Filed Sept 28, 1934 4 Sheets-Sheet 3 I ll R i 1 EX Q I @Xi 1 Q l l (I: k mm i Q I & Q

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hi1 RM INVENTOR. HAW/841D 404415 JJEEP/f BEPfH/A/ ATTORNEY.

. Oct. 6, 1936. I A, G ADAMS ET AL 2,056,380

CORE CRIMPING MACHINE Filed Sept. 28, 1934 4 Sheets-Sheet 4 Wif.

INVENTOR ARCH/EH10 a. HDHMS JOSEPH BEPMl/V g wam' ATTORNEY Patented Oct. 6, 1936 UNITED STATES PATENT OFFICE CORE CRIMPING MACHINE Application September 28, 1934, Serial No. 745,917

7 Claims. (Cl. 93-83) Our present invention relates to an apparatus for crimping the ends of fibrous cores commonly used in the news-print and other industries as the central core of large rolls of paper or other fabric. These cores are preferably made of paper wound upon itself into a very dense, rigid cylinder. The paper is relatively non-compressible and the resulting structure is so unyielding that tremendous force is required to dent or compress its surface. However, as is true of many materi als which are relatively strong in compression, the paper is relatively poor in resistance, tearing and fracturing. Newsprint cores are provided with a slot at one end adapted to coact with a key on the shaft of the winding or unwinding mechanism. In the modern high speed machines, sudden shocks are quite often transmitted through these cores, and the key is liable to fracture the core and render it useless. For this reason the fibrous cores are provided with a metallic cap such as set forth in the patent to Phillip T. Dodge, 1, 1,358,531.

It has heretofore been common practice to flare the flanges of such metallic caps in order that they may be slid lengthwise upon the end of the core. After the cap is seated it is compressed in an attempt to drive the outer flange into the material of the core so that its surface is flush with the outer surface of the core, to preserve a uniform diameter for even winding of the paper, or other fabric. The rigidity of the metal cap in combination with the rigidity of some cores often renders this impossible of achievement. A second. method of seating core caps has been to preform the capof very heavy sheet metal and. drive the same onto the core in the hope that the cap would compress the fibres thereof as it was driven into place. This method proved unsatisfactory inasmuch as the cap would often gouge up a ridge of material, or would be flared outward from the surface of the core. In any event, the result was never uniform and perfect. A third method which was found better in some respects was to squeeze sections of the core between a pair of very strong squeezing jaws whose surfaces were curved to fit the curvature of the core. This proved unsatisfactory inasmuch as the small surface of the core under compression would tend to be fractured from the remaining free surface of the core. As the core would be rotated between the jaws for successive squeezing operations there would be formed numerous weakened or fractured areas. The ultimate result would sometimes be that a shock transmitted through the keyway of the metal cap fractured the entire end of the core away from the remainder thereof. Applicants present invention is a mechanism so devised as to overcome all of these objectionable features of past practice.

The invention comprises a number of radially disposed inner and outer jaws so devised that a uniform crimping pressure takes place throughout the entire surface of the end of the core, thereby preventing the formation of fractures and weakened spots. The inner and outer jaws are operated by the same impelling mechanism from which force is transmitted through a rigidly aligned head so that pressure at every part of the core will be evenly and simultaneously applied. The resulting crimped core may have a preformed cap slid thereon to form a capped core having a uniform outer diameter which is free from ridges, fractures and weakened portions.

Other objects and advantages of our invention will be apparent from the following specification taken in connection with the accompanying drawings wherein like numerals refer to like parts throughout. In the drawings:

Fig. 1 is an end elevation of our machine looking into the crimping throat;

Fig. 2 is a partial, vertical section taken along line 22 of Fig. 1 and illustrating details of a safety clutch which may be utilized, if desired;

Fig. 3 is a partial end view of the safety clutch illustrating the clutch in driving engagement;

Fig. 4 is a large scale view of the clutch dog;

Fig. 5 is a side elevation of the entire machine illustrating features thereof;

Fig. 6 is an elevation of an adjustable eccentric driving means comprising a portion of the mechanism;

Fig. '7 is a top plan View of the eccentric shown in Fig. 6;

Fig. 8 is a large scale, vertical section of the crimping mechanism, illustrating details thereof as the jaws are compressed and crimping the end of a core;

Fig. 9 is an end elevation of the inner crimping member showing details of the crimping jaws;

Fig. 10 is a' vertical section taken along line m so of Fig. 9;

Fig. 11 is a view similar to Fig. 8 but showing the jaws in open position as a core is presented thereto;

Fig. 12 is a vertical section taken along line l2-I2 of Fig. 11 and showing details of the mounting and arrangement of the outer crimping jaws; and

Fig. 13 is a plan view of one of the outer crimping jaws.

Our invention comprises a suitable standard 20 upon which is located a driving shaft El driven by a pulley Z2 keyed thereon. A pinion 23 keyed to shaft 25 drives a large gear in order that the resulting movement of the crimping jaws may be as slow as desired. Gear 24 has a flange 2E3 integral therewith, which flange is provided with. a series of internal notches 26. The gear is loosely mounted upon a shaft 2'! supported in the standard 2t. Keyed to shaft 2? is a driven clutch member comprising a disc with a dog seat 29 formed in its periphery. The inner end of the dog seat 28 is preferably extended inward in the form of a boss within which is seated the rounded end 39 of a clutch dog 3%. The dog seat is so formed that the rounded end of thedog may be slid lengthwise into the boss and. may have a limited rotative movement therein. The dog extends forwardly toward the periphery of the driven clutch member and is formed with an engaging portion 32 and a tab end 33. The engaging portion 32 is adapted to interlock with a notch in the driving flange 25. Because of the very slow speed achieved through the reduction gearing the tab end 33 may be caught and held to cause disengagement of the clutch. The driven member is formed with a small bore 34 having a locking pin urged outwardly by a spring seated therein. The reduced end of the locking pin 35 fits into a groove 36 in the clutch dog and prevents endwise movement of the rounded end in the boss of the dog seat. The clutch mechanism is a safety device and is normally never used. due to the fact that the opening and closing of the crimping jaws continually takes place at such a speed that the operator can insert and remove cores as long as desired and as long as the machine is in use.

Shaft extends through a bearing ii! mounted in the standard and at its end is provided with a key engaging with and driving an adjustable eccentric ll. The eccentri is provided with a screw 42 and sliding block 43 by means of which an eccentric pin 4 may be given greater or lesser eccentricity. The eccentric pin as continually revolves abo t shaft 2'5 in one direction. A jointed pitman connects the eccentric. pin id to a crank 55 associated with the crimping head. The jointed pitman allows relative endwise movement of the crank 46 and the eccentric pin l for a reason which will presently appear. The crank at is in effect a large nut, having an arm integral therewith, which is screwed upon a threaded member 6?. The eccentricity of the pin is is adjusted to give the desired component of movement of crank arm 46 above and below the horizontal, preferably a total of about 45 to 60 degrees of movement. The result is that for every complete rotation of pin tie the crank 46 will be partially rotated relative to member ll in a tightening direction and then partially rotated in the opposite or loosening direction. The member i? is provided with a reduced forward portion defined by a shoulder 58. Keyed to this reduced portion is a jaw holding block 5%? which prevents relative rotation of the member ii and the standard 20 inasmuch as block is is fixed with respect to the standard 26 by means of set screws 59 in a surrounding sleeve 5! bolted to the standard. A cam ring 55 surrounds member in abutting relation to block 49 and is followed by a sleeve 56 and a washer 51. A headed bolt 58 is provided with a reduced threaded end defining a shoulder which rigidly locks the washer 57 and members 56, 55, and

it together and against shoulder 48. As a result of the rigid assembly of these members cam ring 55 is rigidly fixed with respect to the standard 20. This rigidity is assisted by a flange or shoulder 59 on block 39 engaging with a matching shoulder on the sleeve iii.

Between the washer 5? and the head of bolt are mounted washers 69 and between which is interposed an extremely strong spring 62 tending to s read the Washers. An integral tubular jav or 63 is positioned so as to surround the cam ring the spacing ring 56 and the bolt 58. A'fiange 5 5 of this jaw member bears against spacing ring as, and the forward tip 55 of the member bears against a shoulder on block 49 to for the jaw member radially with respect to the member ii. An internal flange 55 having an inclined cam surface is seated upon the cam ring 55. The greater portion of the jaw mem- E3 is longitudinally slotted as at 6? to define 5 through the outer end of member An ange 58 defines a limiting shoulder to define the extent to which the core iii may be in serted into the crimping head. The inner surface of flange 68 is adapted to receive thrusts transmitted by the partial rotation of crank as to relative movement of member 63 and motorber i'i. In Fig. 11 the jaws are open and a core has been inserted against flange 63. 8 the partial rotation of crank it; has caused out ward movement of member 63, as will hereinafter a thereby causing the cam surfaces 53 to upward on the cam ring 55 and causing spreading of the inner crimping jaws. Since it is not necessary that the inner portion of the core cap flange should lie flush with the inner surso of the core the crimping achieved thereby 1a is greatest at the lip of the core and gradually decreases toward a point i l preferably some distance inward from the outer crimping portion. The flange bears against the washer iii and compresses the spring 62 as shown in Fig. 8. The ultimate reversing movement of crank d6 will be paralleled by a returning movement of member by reason of the expansion of spring caus ing inward movement of the inner crimping jaws to the position of Fig. 11.

The mechanism for operating the outer crimping jaws and the structure thereof will now be described. A ring i5 is positioned against the inner face of crank A thrust member it is close to ring '55 but does not contact therewith. Surrounding a flange of thrust member are spaced rings ii and 78 between which are located steel balls is confined in pockets or raceways in 1 adjacent faces of rings 1? and T8. A retain= collar Fit may be provided, if desired. Inward movement of ring it) due to the partial rotation of crank 45 causes inward movement of thrust member 76, without rotation thereof because of the balls '59. The block as is provided with radially extending slots til within which are positioned the narrow hafts of a series of outer crimping jaws 8E. The outer ends of the hafts of the crimping jaws are seated in an annular groove in the face of thrust member iii in such a fashion that limited pivoting movement of the free ends of the jaw members may occur while continual thrust will be transmitted longitudinally of the jaw members. A ring surround ing member ll and free to move relative thereto fits into notches in the jaw members 82 for a purpose which will presently appear. The jaw members contact the bottom of slots 8| at or In Fig.

near point 84, and from point 84 to their free ends are reduced in depth so as to allow rocking movement of the jaw members within the slots iii. The free ends of the jaw members are provided with cam faces 85 matching a cam ring 86 bolted to the sleeve 5| so that relative movement of the jaw members 82 and the standard 20 will cause crimping of the outer surface of the core 76. Seated in reduced inward extensions of slots 8| are a series of thrust bars 99, one end of each bearing against the ring 83 and the other end of each being provided with a depending hook portion 9! designed to fit between the flange 68 of member 63 and the inner surface of block 49. The length of the portion 65 of member 63 is such as to allow normal freedom of movement of the hook portion 9|, and a spring 92 seated in a socket in block 49 forces the hook portion 9| upward to the farthest extent allowed by movement of member 82 in the slot 8!. Thus in the open position illustrated in Fig. 11 the outer jaws will be held open to receive a core. Surrounding member 4! are a series of spring pressed plungers 93 tending to force ring 93 away from block 49 and hence outwardly relative to standard 26.

The operation of the device will be understood best by the following statement. As crank 46 rotates, a movement and thrust is transmitted through the thrust member 16 and through the jaw members 82 whereupon the cam ring 86 will cause inward movement and crimping of the outer surface of the core. The movement of members 82 causes a corresponding movement of ring 83 which transmits the movement and thrust through members 90 and shoulder 68 to cause member 63 to move outwardly and the inner crimping jaws to ride up on cam ring 55 thereby simultaneously crimping the inner surface of the core. The amount of pressure applied to each section or jaw of the inner crimping member and to each of the outer crimping jaws is exactly the same at any given instance and the radial movement of each part is exactly the same, and also the inner jaws and the outer jaws have exactly the same lengthwise movement relative to standard 26. As the crank 46 reverses and loosens the jaws the position illustrated in Fig. 11 is attained by reason of spring 62 transmitting thrust through shoulder 64, shoulder 68, members 99 and ring 83. Since the outer jaw members 82 are hooked over ring 83 they will be drawn toward the left end of Fig. 11 and the springs 92 will cause members 96 to rock the jaws outward thereby opening the outer crimping members. The inner crimping jaws, due to their being resilient and connected to an integral end ring, will tend to open of their own accord as cam surfaces 66 slide downward on cam ring 55. The plungers 93 tend to prevent binding of ring 83 and assist the spring 62 in returning the parts to open position.

The outer jaw members are so fashioned as to compress the outer surface of the core evenly inward the distance desired, the tips of the jaws defining the shoulder 95 which is located preferably at the point where the outer flange of the metallic cap will terminate. For this reason the entire outer flange of the cap will lie in the plane of the outer surface of the core and flush therewith throughout its extent. The gradually decreasing compressed area of the inner surface of the core will provide the necessary wedging action to firmly unite the cap to the core.

The foregoing constitutes a preferred embodiment of our invention and we do not intend to be limited to the exact details thereof, but claim as our invention any alterations, modifications and substitutions which may come within the scope of the following claims which are to be broadly construed.

We claim:

1. A core crimping machine comprising radially disposed inner and outer jaws adapted to crimp substantially the entire inner and outer surfaces of the end of a core, means to move each of said jaws in a longitudinal direction simultaneously and to the same extent, and stationary cams with which said jaws coact to cause crimping action thereof.

2. A core crimping machine comprising radially disposed inner and outer jaws adapted to crimp substantially the entire inner and outer surfaces of the end of a core, means to move each of said jaws in a longitudinal direction simultaneously and to the same extent, and stationary cams with which said jaws coact to cause crimping action thereof, said cams being so disposed that the crimping movement of each of said inner jaws and each of said outer jaws simultaneous and coextensive.

3. A core crimping machine comprising radially disposed inner and outer jaws adapted to crimp substantially the entire inner and outer surfaces of the end of a core, and means to move each of said jaws in a longitudinal direction simultaneously and to the same extent, and stationary cams with which said jaws coact to cause crimping action thereof, said means comprising positive mechanism for causing longitudinal movement in one direction during the crimping action and resilient means for causing longitudinal return movement.

4. A core crimping machine comprising radially disposed inner and outer jaws adapted to crimp substantially the entire inner and outer surfaces of the end of a core, and means to operate each of said inner jaws and ends of said outer jaws simultaneously and to the same extent, said means comprising a threaded member about which said jaws are mounted and a cooperating threaded crank adapted to cause longitudinal movement of said jaws as it is rotated about said threaded member.

5. A core crimping machine comprising radially disposed inner and outer jaws adapted to crimp substantially the entire inner and outer surfaces of the end of a core, and means to operate each of said jaws simultaneously and to the same extent, said means comprising a threaded member about which said jaws are mounted and a cooperating threaded crank adapted to cause longitudinal movement of said jaws as it is rotated about said first threaded member, an inner cam ring mounted upon said threaded member and an outer cam ring fixed with respect to said threaded member and said inner cam ring, and bevelled surfaces upon said jaws cooperating with said cam rings whereby longitudinal movement thereof causes outward movement of said inner jaws and inward movement of said outer jaws.

6. A core crimping machine comprising an outer cam ring and a concentric inner cam ring fixed with respect to said outer cam ring, concentrically mounted inner and outer crimping jaws cooperating with said inner and outer cam rings respectively, and means for causing relative movement of said jaws and said rings in a direction parallel to the axis thereof.

'7. A core crimping machine comprising a threaded member, an outer cam ring and an inner cam ring fixed with respect to said outer cam ring, concentrically mounted inner and outer crimping jaws cooperating with said inner and outer cam rings respectively, and means for causing relative movementrof said jaws and said rings in a direction parallel to the axis thereof, said means comprising a crank threaded upon said member and means to oscillate said crank. ARCI-IIBALD G. ADAMS. JOSEPH BERTAIN.

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