US1663892A - Can-body-forming machine - Google Patents

Description

March 27, 1928. 1,663,892

J. M. VAN HAASTEREN CAN BODY FORMING MACHINE Filed Jan. 26. 1927 3 Sheets-Sheet 1 //v v/v Toe L/OHANNES MART/HHS VAN f/MsTEeE/v ATTOQNE) March 27,1928. 1,663,892

J. M. VAN HAASTEREN CAN BODY FORMING MACHINE,

3 Sheets-Sheet 6" Y I .H 1 4 9 J- Jam/was MAE r/m/s m/v f/Ms r525 ATTORNEY J. M. VAN HAASTEREN CAN BODY FORMING MACHINE March 27, 1928. 1,663,892

Filed Jan. 26. 1927 3 Sheets$heet 5 if M Patented Mar. 27, 1928.

UNITED. STATE "PATENT OFFICE.

JOI-IANNES MARTINUS VAN HAASTEREN, OF SCHIEDAM, NETHERLANDS, ASSIGNOR TO. NAAMLOOZE VENNOOTSCHAP: DE KOMEET, OF SCHIEDA'M, NETHERLANDS, A.

CORPORATION OF THE NETHERLANDS.

, cAiv-BonY-FoRMINe MACHINE.

Application filed January 26, 1927, Serial No. 163,772, and in the Netherlands February 11, 1825.

ed with bent edges, are wrapped around an expansion hornby means ofoutside forming flaps and the edges interlocked, whereafter a compressing hammer, when rising, presses the interlocked edges of the blank clasped one in the other, against the horn and completes the formation of the seam.

With the known machines of this kind it has been found difficult to make cansofvarious diameters upon one and the samehorn. if cans having, ltor'example, a'dlameter 1 mm. larger than others. are to be made, one:

has to make usefof another hornan'd other forming flaps. The expansion of the known horns is obtained by causing sidepieces of the horn to swing around axes parallel to the V axis of the horn itself. A great partof the periphery of the sidepieces therefore does not partake of theincreases of the diameter of the horn. Moreover the mechanism for moving the sidepieces does notallow "a disrequired to obtain the desired larger diam- .eter. 7 l i The chief object of the invention is to overcome this difiiculty and to obtain a machine in which, with one horn and one set of forming flaps, can bodies can be made of various sizes. K k j To this end, according to the invention, the sidepieces of V the expansion horn are made movable laterally parallel to each other, about perpendicularly -'to the axis of the horn. A small displacement of the sidepieces isthen suflicient toobtain theexpansion necessary to stretch theblank around the horns, so that cans {varying in diameter e. g. from 7 8 mm. upto 82 mm. maybe made with one horn.

The mechanism imparting the up and down movement to the compressing hammer may be used to engage simultaneously the sidepieces of the horn.

'In constructing this mechanism one is free- According to the lnvention now the arrangement is made in such a way that first placement to such an extent as would be 15, through whichproject the expansion of the horn is reaching its maximum value. Thereafter the hammer still rises, but the expansion of the horn is decreasing already slightly and in the mo-'- ment that the seam'is being pressed, the body lies free. around the horn.

This may be considered to be an'import ant advantage over the known constructions,

in which the expansion of the horn is still increasingwhile the bent edges of the bodyblank are already pinched under thehammer,

and the expansion only ends when the ham-1 mer has reached its highest point.

The invention and its features will be more fully understood from the claims and with reference to the accompanying-drawings in which a device according to the invention illustrated by way ofexample.

Fig. 1 is a rear elevationof'th'e horn with flaps and hammer. v

Fig- 2 is a side elevation thereof. 1

Fig. 3' is a diagram showing the highest position of the hammer. V

Fig. 4 is a horizontal section of the horn. 5 is a side elevation of one of the wedges. I

Fig. 6 is a rear elevation and Fig. 7 a side elevation of the central p01: tion of the horn.

p The expansion horn comprises a central portion 1 and two side-pieces 2 and 3. The central portion is attached to the portion of the machine by the flange 4. At the rear side the supporting bolt 5, carrying the horn. 6, is secured in the central portion.

The movable side pieces 2 and 3 are guided with respect to the centralportion by the set pin '7 and are pulledtowards their innermost position by the spring 8.

Between the side piece 2 and the centralportion the wedge 9 is located, between the side piece 3 and the central portion the Wedge 10; The said wedges are provided at one side 'with an inclined portion,- 11, sliding along theepiece-s 12, and at the other side with an inclined portion 13. 'They project outside the side pieces and are'there provided with hardened steel pressure pieces 14. The wedges are provided with longitudinal slots the spring 8 and the set pin 7 e 1 The wedges 9 and lOnia y be driven in axial direction (Figs. 1 and 2) by means of the bell cranklevers 16 adapted to swing abouta pin 17 The said levers are actuated by the sliding piece 18 provided at the upper side with a pushing block 19' and guided in a side piece 20 secured to the hammer block 21. The sliding piece 18 is sur-..

rounded at the lower end by a helical spring 22, mounted in such a manner, that it tends orting piece 25 of the hammer. Between" the head of the driving rod and the pin 28 an eccentric adjusting sleeve 29 is arranged. Thissleevemay be turned into different positionsandmay be clamped in the head by means of the clamping boltl30.

The. hammer21 is provided at the upper side with a hitting strip 31, by means of which the seam mayv be pressed against a strip 32 in the lower side of the horn.

At the upper side of the horn the strip 33 is arranged, over which strip the plate to be bentis bent. Above'the horn the flapholder Sa is located whichat the lowerend opposite; the strip .33 is provided with a strip 35.

The flaps 36 and 37 are rotatable about the pins 38 in: the flap-holder 34. The flaps are connected at the points 39 to rods 10 by means of which they be moved up and down. I

At the lower end the flaps are provided with adjustable angular pieces 41, support- The adjustment of ing the steel plates 42. the angular pieces 41 is effected by means of the bolts 13 in oval holes 414.

The operation of the device is as follows: Around theexpansion horn 1, 2, 3 the body plate already provided with 'cut-od corners and bent edges is bent by means of the flaps 36 and 37,.so that the bent edges interlock. This interlocking of the edges is effected justprior to the forming flaps having reached their narrowest position. At this moment the hitting block 19 contacts with the bellcrank levers 16, whereby the Wedges .9 and 10 are pressed and the side pieces 2 and 3 of the horn are forced outwardly, so that the blank with interhooked side edges is stretched tightly around the hornl Y When the expansion horn starts expanding the hammer 21, which is already ascending is located at a distance of about .8 mm.

from its uppermost position. In the period of stretching the blank the strip 31 of the hammer is located at a distance of about mm. from the strip 32 in the horn and these strips may approach each other entirely for the reason that the flaps 36 and 37 have already been, moved away from each other. At the same time the expansion of the horn is already decreasing which may appear from acomparison of Figures 2 and 3. Fi nally the hammer presses the edges of the blank into a permanent seam.

In Fig. 2 the position is shown, in which the pressure plate 241 occupies its highest position, i. e. in which the side 3 are farthest apart. 1

Now if the crank 27 moves'on in the di' rection of the arrow, then the plate 2st is lowered while the block 21 ascends still further. I V

In Fig. 3 the highest position of the. pin" 28' is denoted by 28". The hammer block then forcestogether the bent edges of the body plate. In this position the plate 24is already lowered to 24:, i. efthe side pieces pieces 2 and in the expansion horn. have already been pulled inwardly by the spring 8.

In order to explain the advantage of this construction the following is remarked.

Assuming that cans are to be made, having adia'meter of 60-116mm. increasing in succession with 2' mm., con tly 2g dif;

ferent diameters, then with this system there r are required: 1 expansion-horn of 6063 mm,

1' do. 0f 6366, I do. of 6669', 1 do. of 69-73, 1 do. of 7348-, 1 (-10. 01778-82, 1 do. tree-s7, 1 do. of ease, I do. or 92-98, 1 do. of 98-106 and 1 do. of 106-116 mm., making totally 1'1 expansion horns with one set of forming .flaps adapted for all types.

In other constructions 28" expansion horns with 2 8,form1ng flaps are required for the the novel horns'is much simpler and much cheaper than the known'ones.

p I' claim: I

1. In a can body forming machine, 'anex pansion horn comprising two sidepieces laterally movable parallel to each other for expanding the horn, means for wrapping a blank around'said sidepieces and interlocksame purpose. Moreover the construction'of'f ing the edges thereof, a hannner adapted to V compress the interlocked edges against the I horn to form them into a seam, and mechanism adapted to actuate said hammer and to simultaneously'force said sidepieces apart.

2. In a machine for forming can bodies from blanks, a substantially cylindrical ex pansion horn comprising. a relatively fixed central member, two sidepieces movable toward and away from each other for expanding the horn, resilient means drawing said sidepleces toward each other, longitudinally movable wedge members between said central member and said sidepieces adapted to lac force said sidepieces radially away from each other, and a hammer adapted to press the edges of the blank into a seam.

3. In a machine for forming can bodies from blanks, and expansion horn comprising sidepieces movable relative to each other, expanding means for positively moving said sidepieces away from each other, a hammer adapted to press the edges of the blank into a seam, and mechanism adapted to simultaneously actuate said hammer and said expanding means. r

4. In a machine for forming can bodies from blanks, an expansion horn comprising sidepieces movable relatively to each other, expansion means for positively moving said sidepieces away from each other, a hammer adapted to press the-edges of the blank into a seam, and mechanism adapted to simultaneously actuate said hammer and said expanding means, said mechanism comprising a pitman rod pivoted to said hammer, and

an arm fixed to said pitman rod, extending transversely thereof, and operatively connected to said expanding means.

5. In a machine for forming can bodies from blanks, anexpansion horn comprising sidepieces movable relative to each other, expansion means for positively moving .said sidepieces away from each other, a hammer adapted to press the edges of the blank into a seam, and mechanism adapted to simultaneously actuate said hammer and said expanding means, said mechanism comprising a pivot pin on said hammer, a pitman rod having one of its ends pivotally mounted on said pin, and eccentric adjustment sleeve interposed between said pin and said rod, and a transverse arm fixed'to said pitman rod ing means.

In testimony whereof I aflix my signature.

JOHANNES MARTINUS van HAASTEREN.

and operatively connected to said expand t

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