US2876820A - Machine to crimp rims to boxes - Google Patents

Description

March 10, 1959 J..O. BURMAN MACHINE To CRIMP RIMS T0 soxEs 5 Sheets-Sheet 1 Filed Feb. 10, 1955 INVENTOR.

Affarngn March '10, 1959 J. o. BURMAN MACHINE TD CRIMP RIMS To BOXES 5 Sheets-Sheet 2 Filed Feb. 10, 1955 Jose 614 0505,10;

INVENTOR.

March 10, 1959 J. o. BURMAN 2,876,820

MACHINE TO CRIMP RIMS TO BOXES Filed Feb. 10, 1955 5 Sheets-Sheet 3 7:80p Barman I INVENTOR.

BY m1??? v AI/arnr March 10, 1959 J. o. BURMAN MACHINE To CRIME RIMS T0 BOXES 5 Sheets-Sheet 4 Filed Feb. 10, 1955 M m M 2W W 0 n 7/ w a N R & N. a w WW QN\\ o0 March 10, 1959 J, o, BURM 2,876,820

' MACHINE TO CRIMP RIMS TO BOXES Filed Feb. 10, 1955 V 5Sheets-She'et 5 j I w 50 J 48 Josefifi O. B rman INVENTOR.

##oro United Satates Patent T0 CRIMP RIMS T0 BOXES Application February 10, 1955, Serial No. 487,240 Claims. (Cl. 153-4) This invention relates to metal forming machinery, and in particular to machinery for fastening metal reinforcing rims onto the lips of paper board and thin metal boxes.

Among the several objects of the invention may be noted the following:

The provision of a sides of a reinforcing in order to fasten the rim in place;

The provision of a machine of the above class in which the amplitude of the stroke of the swage or crimping hammer remains constant but the force of the swaging action may be quickly adjusted to a desired amount;

The provision of a rim-crimping machine of the general class above, in which the amount of crimping done on a rim is at all times under the control of the operator of the machine;

The provision of a basic rim-crimping machine of the above general classes which may quickly and economically be adapted to do its work on boxes of different sizes and shapes; I

The provision of a rim-crimping machine which is power driven and yet which is safe for the operator to use; and

The provision of a atively economical to of moving parts.

Other objects and advantages of the invention Will be in part obvious and in part pointed out hereinafter.

The invention accordingly comprises the elements and combination of elements, features of construction and arrangements of parts which will be exemplified in the structures hereinafter described, and the scope of the application of which will be indicated in the following claims. 1

In the accompanying drawings, in which is illustrated one embodiment of the invention:

- Fig. 1 is a vertical view of the embodiment of the invention;

Fig. 2 is a plan view of the Fig. lembodiment, broken away in part;

.Fig. 3 is a vertical cross section of a portion of Fig. 1, taken in the direction of sight lines 33 on Fig. 2;

Fig. 4 is a vertical cross section of a portion of Fig. 1, taken in the direction of sight lines 44 on Fig. 2, to show details of the foot-operated cam shaft;

Fig. 5 is a view similar to Fig. 3, but showing certain operating parts in a different position;

Fig. 6 is a vertical section of a portion of this embodiment, taken in the direction of sight lines 66 on Fig. 2;

J Fig. 7 is an enlarged view of a bodiment, given to show swaged; and

Fig. 8 is a perspective parts of the invention.

Similar reference characters indicate corresponding parts throughout the several views of the drawings.

simple machine for crimping the rim placed over the lips of a box rim-crimping machine which is relmake, and which has a minimum portion of this ema box rim in place and being view of one of the operating each rib. Each of said threading into the studs 2,876,820 Patented Mar. 10, 1959 8 ice Referring now to Figs. 1 and 2, there are shown side and plan views of one embodiment of v this invention. A table 2 is provided (made of steel or cast iron) supported by the side legs 4 and 6. A cross bar 8 is provided at the bottom, as shown, for reinforcement, and to provide a supporting structure for operating parts of the embodiment. A box-supporting plate 10 rests on top of table 2 and superimposed thereon is a box-holding die plate 12. These plates are fastened to the table 2 in any conventional way, as by the bolts 14. Die plate 12 is provided with a central opening 16 therein which matches in shape and receives closely therein the edges of a box and its reinforcing rim as shown by dotted lines 18 in Fig. 3. At the center of support plate 10 are provided the intersecting slots 20 and 22, which extend through the plate and form, as shown, a cross-shaped opening.

Table 2 is provided with the four slots 24, 26, 28, and 30 which extend therethrough, these slots being at right angles to each other and intersecting at the center of the table. They are in alignment with slots 20 and 22. Slidably received in each of these slots are the sliding members 32, 34, 36, and 38, respectively. (Fig. 8 shows in perspective one of the slides.) Each of slides 32, 34, 36 and 38 is formed to have an upstanding rib 40, 42, 44, and 46, respectively, on the top thereof, it being these ribs (in each case) which are received by the respective slots in the table 2. By this construction, as clearly shown in Fig. 6, each slide is held against the bottom surface of the table 2 by the flange on each side of slides slidably rests on the top of the bearing plate 48 which in turn is held to the bottom of table 2 by means of the four mounting studs 50, these studs being either in the form of thick separate spacer washers, or they may be cast integrally as a part of table 2. Their spacing is such as to permit each of the four slides 32, 34, 36, and 38 to move freely back and forth in its slot. The exact form of fastener used to fasten bearing plate 48 to the table 2 is not material to this invention. As shown, bolts 52 are used, these. passing through properly spaced holes in plate 48 and 50 if the latter are a part of table 2. Each of slides 32, 34, 36, and 38 has its inner end 54 tapered laterally (see Fig. 8) so as to allow the slide ends to meet at the center of the die opening 16 in plate 12, as shown in Figs. 2 and 8. Additionally, the face to slant backin its hole 60, directly against the end of the respective slot. sired, a shallow anchoring recess for the outer each spring can be If deend of provided,'or a forwardly extending stud over which the spring fits, in conventional manner .to prevent lateral slip of the end of the spring.

Four hammer or swaging plates 70, 72, 74, and 76, triangular in shape so as to fit together, rest on the plate 10, as shown, and are thus co-planar. Each ofthes'e plates is provided with a;..thrust hole 78 which receives 6 ;the bushing 58 therein in a snug fit. A washer-headed,

screw 80 threads into each bushing 58 to hold the respective swaging plate onto the bushing. The height of the bushings is such that each swaging plate slides freely on top of the plate 10, the bushings 58 projecting upward a sufficient distance through the slots 20 and 22 and sliding freely therein, these slots having been provided for that purpose in plate 10.

It will be observed that the size and shape of the swaging plates is such that when assembled as shown in Fig. 2, the outer periphery of the assembly is the same shape as, but somewhat smaller than, the inside of the box whose rim is to be swaged. Thus, as each of the slides32, 34, 36, and 38 is moved back and forth in its slot, it in turn is enabled to move its respective swaging plate toward and away from the mating edge of hole 16. Thus the vertical edges of hole 16 act as back-up means, or back-up anvils. Instead of the single die plate 12, separate back-up anvils can be provided, if desired. Said anvils would, of course, be separately and individually fastened to the table in any conventional manner. Their inner vertical faces would then act as do the edges of the hole 16. An examination of Figs. and 7 will reveal that the outer edge of each swaging plate is preferably formed with a lip 82, with the result that when the swaging plate compresses (or swages) the rim 84 of box 18 against the edge of the hole 16, a lipped shape is imparted to the rim. The covering material 86 on the box is thus also compressed between the rim and the box itself.

Next will be described the adjustable drive means for the slides, and the means whereby the mean position of each slide during its reciprocation can be adjustably varied. These will be seen most clearly by reference to Figs. 3,, 4 and 5.

It has been mentioned above that the four slides rest and slide on the top surface of the bearing plate 48. This bearing plate is of type (a ball-bearing type being indicated in cross-section by numeral 88 in Fig. 5), and rotatably supports the upper end of hollow drive shaft 90. The bottom end of the drive shaft is rotatably supported by a similar ball bearing 92 which is mounted by bolts 94 to cross bar 8. The bore of shaft 90 is stepped as shown at 96 to provide a larger bore at the bottom portion thari at the top. A pulley 98 is fastened to the drive shaft 90 in position to be driven by a belt 100 which in turn is driven by the electric motor 102, this motor being fastened to leg 60f the table.

To the front edge of bar 8 is fastened by conventional means the dependent clevis bracket 104, and pivoted to this by pin 106 is the foot lever 13% having the footpad 110 at its outer end. The inner end 112 of lever 108 extends under the bearing plate 92, and receives thereon one end of the vertical adjusting shaft 114. which slidably fits the interior of drive shaft 90. The lower end of shaft 114 is provided with clevis 115 which rests in slidable manner over the edge of the inner end 112, to permit the lever to raise and lower this shaft freely, and to prevent rotation of the shaft.

Mounted on the top end of shaft 114 is the thrust ball bearing 116 which supports the vertically movable cam shaft 118. Shaft 118 slidably fits the interior of drive shaft- 90, and, as shown, is provided with a redosed-diameter portion 120 to lessen the weight of the shaft and the friction between it and shaft 9% An enlarged end portion 122 is fitted to the aforementioned ball thrust bearing. Thus a freely rotating joint exists between shafts 118 and 114, which permits shaft 114 to remain stationary while hollow shaft 90. and cam shaft 118 rotate together.

A slot 124 is provided in cam shaft 113, and a pin 126 extends through this slotand through properly spaced holes in drive shaft 96. Thus, as. shaft 91! turns, it drives camshaft 118, andthe latter; is free: totbe, moved up auad down (as. indicated by dotted lines). while. it is turning,

either the roller or ball-bearing.

8 this motion being imparted to it by means of the foot lever 108 and the shaft 114.

A stop-screw 128 is adjustably threaded into a thickened portion 130 of cross bar 8, and is so positioned and inclined that its bottom end serves to stop the upward motion of end 112. A spring 132 is provided to maintain the adjusted position of screw 128, and a handwheel 134, in customary manner. In this way, the upward motion of cam shaft 118 has an adjustable limit placed on it.

The top end of cam shaft 118 is turned to an eccentric cone-shaped cam surface 140 as will be indicated by a comparison of Figs. 3 and 5, Fig. 3 showing shaft 118 in one position, and Fig. 5 showing the shaft rotated 180. The angle of the cone 140 is the same angle that has been given to each of the noses 56 of the slides 32, 34, 36, and 38. When the cam shaft 118 is in its lowest position, that is, the foot lever 198 is all the way up, the cam cone 140 is positioned just below the faces 56, so that the slides are not engaged by the cam and remain stationary even though the shaft 118 may be rotating. To energize or drive the slides, the foot lever 108 is depressed, raising shaft 114. This in turn raises the shaft 113 and advances the cone 149 between and in contact with the noses of the slides 3238. Becauseof the eccentricity of the cone, each slide is successively moved by the cone outwardly with the compression spring 62-68 causing the slides to stay in engagement with the cone and move inwardly. The amount of eccentricity of the cone determines the amount of motion of each slide, and hence of each swaging plate, regardless of the vertical position of shaft 118. If shaft 118 is moved upward, the amount of back-and-forth motion of each plate does not change, but the plates will all be brought closer to the respective opposing edges of the die or box-receiving hole 16. Dropping the cam shaft will move the plates further away from the opposing edges. That is, the upward and downward motion of the cam shaft at the will of the operator changes the mean reciprocatory position of the slide, but not the amplitude of the motion of the slide.

Thus, there is provided a set of swaging plates and driving means therefor which are so arranged that a constant amount of reciprocation is imparted to the plates, but the plates can, during their reciprocation, be moved closer to or further away vil. By this means, a quick swaging of rims to a box is accomplished, with a minimum of vibration, and with a minimum of noise. Because the reciprocation is constant, it lends ready adjustment to the position of the swaging plates. The constant amount ing done on a rim.

is provided to give clearance to the box hinge and, if-

necessary, to the other half of the box. So also, swaging plate 76 is relieved, as shown provide hinge clearance. and 148 are provided on swaging plate 76 to swage the ends of the rim.) With the box and rim held in this position, the motor 102 is started (if not already running) and lever 108 is depressed. Cam shaft 118'is reciprocating the swaging plates as moved upwardly, the eccentric cone rotates, and moving the mean position of each plate outwardly to press or swage the- When the desired de-- rim against the edges of hole 16. gree of swaging has been done, this position of the foot lever is set by turning the adjustable stop-screw 128 un-' til its. inner end bears against the inner end 112 of the foot-lever. Thereafter, as. each from an opposing an-' of reciprocation enables better control to be had of the amount of swag-- by numeral 144, to Protruding edge portions 146- box and rim isinserted 1 in hole 16, the lever 108 is screw 128, thus insuring a fixed amount of swaging.

It is to be observed that throughout the embodiment, suitable metals are provided for the several parts in accordance with standard construction practices for machines.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As many changes could be made in the above constructions without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings, shall be interpreted as illustrative and not in a limiting sense.

I claim:

1. Box rim swaging apparatus comprising a table for supporting a box having a plurality of sides and a rim on the edge of each of said sides; a die plate fastened to the table and having a die-hole therein the shape of said box, the edges of the die hole constituting back-up anvils for the sides of the box and the rim; a plurality of co-planar swaging plates lying on said table within said die-hole and each being reciprocally movable on the table independently of the others, one plate to a diehole side, toward and away from a corresponding backup anvil; and adjustable eccentric cam drive means for actuating said plates, the adjustment thereof varying the mean position of each plate, but not the amount of its reciprocation.

2. Box rim swaging apparatus comprising a table; backup means positioned on the table and enclosing a space adapted to receive the box; four slots extending through the table and lying at right angles to each other about a central point; four slide members, one each being slidably mounted in each of said slots and movable toward and away from said central point, the inner end of each slide member being tapered downwardly and backwardly; four swaging plates, one each fastened to each of said slides and movable therewith, said plates being positioned so as to be within said space with the outer edge of each plate lying substantially parallel to the inner edge of a corresponding portion of said back-up means; a rotatable and vertically movable shaft mounted beneath the table and having at its upper end a coneshaped eccentric cam, the vertical motion of said shaft being such as to bring the surface of said cone into contact with the tapered inner end of each slide whereby each slide is moved outwardly in its slot by said cam as said shaft rotates; means biasing each slide toward said cam; and adjustable means for moving said shaft vertically.

3. The swaging apparatus of claim 2 in which said depressed until stopped by back-up means comprises a plate separably fastened to the top of said table, said plate being provided with a hole therein whose shape corresponds at least in part with the shape of the box to which is to be attached a rim, the edges of the plate constituting vertical anvils against which said swaging plates can press the sides of the box.

4. In combination, a hammer and an adjustable means for reciprocating said hammer whereby the mean position of said hammer may be changed but not the amplitude of its motion, comprising a support; a hammer slidable on said support; a shaft rotatably mounted on said support with the axis of the shaft substantially perpendicular to the plane of motion of said hammer; a coneshaped cam on said shaft with the axis of said cone parallel to the axis of the shaft but displaced laterally there from, said cam and shaft being positioned so that the side of said cam engages said hammer to actuate the latter as the cam rotates; and means for moving said cam axially with respect to the plane of motion of said hammer while said cam is rotating, thereby to shift on the side of said cam the place of its engagement with said hammer to change the mean position of the hammer but not the amplitude of its reciprocatory motion.

5. Box rim swaging apparatus comprising a table; backup means positioned on the table and enclosing a space adapted to receive a box; at least one movable hammer means positioned within said space and adapted to be moved toward and away from a corresponding portion of the back-up means; at least one slot extending through said table in a direction substantially perpendicular to the inner edge of said portion of the back-up means; a slide member slidably mounted in said slot and fastened to said movable hammer means for moving the latter; and adjustable eccentric cam means for reciprocating said slide; said slide having a tapered inner end and said adjustable eccentric cam means comprising a rotating shaft longitudinally adjustable with an eccentric cone-shaped cam surface at one end thereof, the surface of said cam acting against said tapered inner end, said adjustable eccentric cam means adjusting the mean position of said slide without changing the amplitude of the slides reciprocatory motion.

References Cited in the file of this patent UNITED STATES PATENTS 1,310,118 Greenfield July 15, 1915 1,524,946 Nystrom Feb. 3, 1925 2,027,664 Andrew Jan. 14, 1936 2,113,699 Lowry Apr. 12, 1938 2,203,955 Frederick June 11, 1940 2,231,278 Miller Feb. 11, 1941 2,664,060 Hammond Dec. 29, 1953

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