US2196619A - Machine for making closures - Google Patents

Description

April 9,-1940. H. T, H. ANDRESEN 2,196,619

- MACHINE FORvMAKING CLOSURES Filed June 6, 1938 Patented Apr. 9, 1940 UNITED STATES PATENT OFFICE 2,196,619 MAcnmE Foa MAKING cLosUnEs Halvor Tobias Hcyerdahl Andresen, Oslo, Norway Application June s, 193s, 4serial No. 212,205

3 Claims.

This invention relates to metal working machines and is concerned more particularly with a novel machine for striking tongues from the wall of a hollow body.. The machine of the in- 5 vention may be employed in the production of articles for various purposes, but since it is especially adapted for use in making connecting devices of the type disclosed in my copending application Serial No. 212,204 filed June 6, 1938, an embodiment of the invention for producing such devices will be illustrated and described in detail for purposes of explanation.

The device of the copending application is intended for connecting together two objects, such, for example, as a vessel and its cover, and one element of the device is a sleeve provided with a plurality of tongues extending generally circumferentially of the sleeve with their bases extending generally axially thereof. The sleeve is con- ;0 nectedto the cover and engages a part of the vessel to hold the cover in place, and in one form of construction, the sleeve is formed as a part o f the cover. The vessel is provided with a flange surrounding its'opening and when the cover is 5 in place, it is seated either directly on the flange or on packing on the flange, and the tongues on the sleeve engage the under side of the flange and hold the parts securely together. V The machine of the presentinvention may be `0 used in lthe formation of the tongues on 'the sleeve of the'connecting device of the copending application, regardless of whether or not the sleeve is integral with the main portion of the cover or separate therefrom. The new machine, l5 accordingly, includes a support for the sleeve blank and a plurality of dies disposed around the support and lying within the sleeve. Outside the sleeve are punches, one for each die, and means are provided for moving the dies and punches 0 toward and away from each other so that in the approaching movement of the parts, the punches strike tongues from the sleeve and force the tongues intoA openings in the dies. Thereafter, during their relative movement of separation, the 5 dies and punches clear the blank and tongues, so that the blank may be readily removed from the support.

For a better understanding of the invention,

reference is made to the accompanying drawing` Fig. 2 is a plan view of the machine shown in 5 Fis. 1:

Fig. 3 is a fragmentary side elevation of the machine;

Fig. 4 is a. sectional view on the line 4-4 of Fig. 1, and

Fig. 5 is a view in side elevation of a container cover which has been provided with tongues by the machine. y

Referring tothe drawing, the machine illustrated includes a pedestal I0 at the top of which is a block II having a shape corresponding to the section of theblank to be operated on. In the machine illustrated, the block is circular since the machine is intended for operating on sleeves of cylindrical section. The block is provided with a central boss I2 which serves as a support for the blank I3 to be acted upon, and extending radially from the boss are guideways I4 formed inthe top of block II. Within each guideway is a movable block I5 provided at its inner end with an extension I6, at the free end of which is a die I'I having any opening I8 therethrough. A punch I9 is mounted in the main portion of the block in alignment with the opening I8, and the end of the punch adjacent the die is cut olf at an angle to the axis of the punch, as illustrated in Fig. 4.

Resting on the upper surfaces of the blocks` I5 is an annular plate 20 provided with a depending. peripheral flange 2I which lies outside the outer faces ofthe blocks, and the plate 20 is provided witha plurality of pairs of cam slots 22, one pair for each block I5 and the punch I9 .mounted therein. Each block I5 is provided with a pin 23 extending upward through an inner slot 22 and each punch carries a pin 24 at its outer end which passes through an outer slot 22.

The plate 20 is movable angularly in its plane, and for this purpose, a pair of rods 25a, 25h are connected to the plate 20 at diametrical points. The outer end of the rod 25a lies within a slot in a lever 26 pivoted at 2I-on the block II, and the lower end of lever 26 is connected by a. slot and pin connection 28 to the end of a crank 29 fast on a shaft 30 mounted in bearings on the pedestal III. The end of pin 25h lies within a slot in the end of a lever 3| pivoted at 32 on the block I I, and at its lower end, the lever is connected'by a slot and pin connection 33 to a lever 34 pivotally mounted on an arm 35 extending laterally. from the pedestal'. The other end of.

. lever 3l is connected by a slot and pin connection 36 to a crank 31 fast on shaft 30. Adjacent one of its bearings, the shaft carries a treadle 38, which is normally maintained in raised position by a spring 39 connectedthereto and to a rod I0 attached to the pedestal I0.

In the starting position, the blocks I5 are at the limit of their inward travel toward the support' I2 and the punches I9 are at the limit of their outward travel. A cover blank I3 is then placed upon the support I2 withits depending flange 4I. lying between the dies and their associated punches. The treadle is now depressed and this rocks the shaft 30, which acts through the levers to move the plate in a clockwise direction when viewed from the top. In this movement of the plate, the'cam slots 22 therein act on the pins 23, 24 and cause the blocks I5 to move outwardly in their guideways Il, until the dies carried thereby engage the inner surface of the flange 4I on the blank. At the same time, the punches 24 are moved inwardly by the cam action to the position illustrated in Fig. 4, where it will l0 be noted that the inclined end of each punch has outwardly. The blank is thus freed from the punches and dies, even though the tongues extend inwardly beyondthe inner surface of the ange on the blank. The blank may, accordingly, be freely removed from the machine and, after a new blank isplace'd in position, the machine is ready for a second operation.

The completed product may be either a tubular sleeve having `a plurality of tongues struck therefrom with their free ends forced inwardly beyond 4Q the inner surface of the sleeve, or a cap having a depending ange with the tongues formed in the flange. The=shape of the tongues depends on-the cross-sectional shape of the punches and the openings in the dies, and in the construction 45 shown, the tongues are generally wedge-shaped and' extend crcumferentially of the sleeve with their bases lying axially of the sleeve.

The guideways I4 in the block II are ot considerably greater length than the blocks I5 mounted therein and this permits the machine to be used in punching sleeves of different diameters. For each variation in diameter, a dierent plate 20 is employed, but since the plate merely rests in position, it may be readily removed and replaced by another, so that changing the machine over from one product to another is a simple operation.

I claim:

1. In a metal working machine, the" combination of a block having a central support for a blank and'a plurality of guideways extending outwardly from the support, a die block movably mounted in each guideway, a punch mounted in each die block, a plate provided with cam slots arranged in pairs andlying offset from the guideways, members attached to each die block and its associated punch, said members entering the cam slots on the plate, and means for moving the plate rotationally to cause each die and its associated.

punch to move toward and away from each other.

2. In a metal working machine, the combinablank and a plurality of guideways extending out-1 war y from the support, a die block movably mou ted in each guideway, a punch mounted in each die block, a plate provided with cam slots arranged in pairs and resting on the die blocks, members attached to each die block and its associated punch for engagement with the cam slots in the plate, and means for moving the plate back and `forth rotationally and thereby causing movements of each punch and its die block in which the die and punch move toward and away from each other.

3. In a metal working machine, the combination of a support for ablank, a die disposed adjacent the support on one side' of the blank and attached to a block mounted beneath the blank, a punch mounted in the block on the other side of the blank and in alignment with the die, the die having an opening to receive the end of the punch, and means for moving the blockan'd punch to cause the punch and die to move toward and away from each other and the blank, the end ot the punch entering the opening in the die in its movement of approach.

HALvoR ,'r. H. ANnREsnN.

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