US2755712A

US2755712A - Apparatus for operating on container

Info

Publication number: US2755712A
Application number: US259184A
Authority: US
Inventors: John G O'neil
Original assignee: WEINON CORP
Current assignee: WEINON Corp
Priority date: 1951-11-30
Filing date: 1951-11-30
Publication date: 1956-07-24
Anticipated expiration: 1973-07-24

Description

TQIHIH July 24, 1956 J. G. O'NEIL 2,755,712

APPARATUS FOR OPERATING 0N CONTAINER Filed Nov. 30, 1951 3 Sheets-Sheet 1 IN VEN TOR.

I! T TWF/VEK y 4, 1956 J. 5. O'NEIL 2,755,712

APPARATUS FDR OPERATING 0N CONTAINER Filed Nov. 30, 1951 3 Sheets-Sheet 2 FIE- III

I I I I I l I I I I IIII I l l I I III I I I OOOOOOOOOOOO ooooooooo bobooooooc 0000 000000000 IN V EN TOR.

Jamv OWE/L BY %%4. x47

y 1956 J. G. O'NEIL 2,755,712

APPARATUS FOR OPERATING ON CONTAINER Filed Nov. 30, 1951 3 Sheets-Sheet 3 FIG 5 3/ FIE JD IN V EN TOR.

JOHN G 0M5.

United States Patent APPARATUS FOR OPERATING ON CONTAINER John G. ONeil, Minneapolis, Minn., assignor to Weinon Corporation, St. Paul, Minn, a corporation of Minnesota Application November 30, 1951, Serial No. 259,184

2 Claims. (Cl. 93--39.2)

This invention relates to an apparatus for operating on a container, which container is made of sheet material which may be heavy paper or light cardboard. Said apparatus acts principally on the lower end portion of said container for closing and sealing the same.

It is an object of this invention to provide a novel apparatus for acting on the end portion of a container made of flexible material, such as heavy paper or light cardboard, said apparatus acting to close the end of said container and seal the same.

It is a further object of the invention to provide an apparatus for operating on a container made of sheet material such as heavy paper or light cardboard, and comprising a shell with a continuous periphery, a cup-shaped member having a peripheral flange disposed in and adjacent one end of said container, said apparatus comprising a mandrel adapted to fit in said shell, and a die for bending the end portion of said shell inwardly and downwardly over and around said flange.

It is also an object of this invention to provide such an apparatus as set forth in the preceding paragraph, said die having an upwardly and inwardly inclined surface for initially bending said portion of said shell inwardly and also having a plurality or multiplicity of pins movable downwardly for bending said end portion of said shell over and around said flange.

It is still another object of the invention to provide an apparatus for operating on a container of sheet material, which container has overlapping portions coated with a suitable lacquer or other suitable substance which will form an adhesive when heated, which apparatus includes a novel electrode for applying pressure and heat to said overlapping portions.

These and other objects and advantages of the invention will be fully set forth in the following description made in connection with the accompanying drawings in which like reference characters refer to similar parts throughout the several views and in which:

Fig. l is a perspective view of the finished container;

Fig. 2 is a vertical diametrical section of the bottom portion of said container;

Fig. 3 is a horizontal section taken through a portion of the machine involving this invention;

Fig. 4 is a view partly in front elevation and partly in central vertical section of a mandrel used;

Fig. 5 is a horizontal section taken on line 5-5 of Fig. 4 as indicated by the arrows;

Fig. 6 is a top plan view of a mechanism used;

Fig. 7 is a view in front elevation of an electrode used;

Fig. 8 is a horizontal section on line 88 of Fig. 7, as indicated by the arrows;

Fig. 9 is a vertical diametrical section through a die used for closing the bottom of said container;

Fig. 10 is a view similar to Fig. 9 showing the parts in diiferent positions; and

Fig. 11 is a horizontal section taken on line 11-11 of Fig. 10, as indicated by the arrows.

portion of a folding ice Referring to the drawings, a container 20 is shown in Fig. l which comprises a body portion 20a, and in the embodiment of the invention illustrated this body portion is shown as cylindrical. Said body portion is made from strong flexible paper-like material, such as heavy paper or light cardboard, the same preferably having a smooth surface. Said body portion or shell 20a is made from a rectangular sheet which is rolled into cylindrical form with overlapping edge portions 20b. Both sides of the said sheet are coated with a thin plastic or lacquer, and while various lacquers or materials might be used, a lacquer formed of pigmented vinol has been found very satisfactory in practice. The overlapping edge portions of the body or shell 20a are pressed between heated dies and very tightly connected and sealed by the said lacquer which acts as an adhesive. Said lacquer forms a waterproof coating so that the shell 20a is thus water proofed both on .its interior and its exterior.

The rectangular sheet referred to is rolled about a mandrel 19, shown in Figs. 5 and 6. Mandrel 19 is shown as having a strip 19a inserted therein which will be made of some metal forming a good conductor of heat, such as bronze or copper. A member 21 underlies strip 19a and is preferably made of a sheet of insulating material. The said sheet is rolled about mandrel 19 by a series of articulated or connected members 23. The forming of the container about the mandrel is disclosed and claimed in applicants co-pending application, S. N. 191,967, filed October 25, 1950, for Method and Apparatus for Producing Container, now U. S. Patent No. 2,725,001. A.

plurality of said mandrels 19 are carried in spaced relation on a table 134 which is intermittently rotated to diflerent positions, as disclosed in said co-pending application. Member 23 has-at one end an electrode 25 which in the operation of the machine is brought opposite electrode 19a. Electrode 25 ha extending longitudinally therethrough a heating element 25a which will be supplied with current from suitable conductors secured to a binding post 25b. The overlapped portions of the sheet overlie the electrode 19a and the electrode 25 is then brought against the other side of the overlapped portions. The heat applied causes the lacquer on the sheet to act as an adhesive and the overlapped portions are very tightly connected. It has been found in practice that much better results are secured with the electrode 25 by having the face thereof engaging the overlapped portions of the shell provided with a multiplicity of small depressions 250. Any tendency of the electrode to stick to the shell is overcome. In practice the face of the electrode is about A; of an inch in width and the diameter of the depressions 250 is approximately of an inch. Electrode 25 is pressed against said overlapped portions with considerable pressure.

A bottom closure is provided for said container and this includes an inverted cup-shaped member 200 having a flat central portion and a peripheral flange 2001 extending downwardly substantially at right angles thereto. Member 20c and its flange fit snugly in the shell 20a and are disposed therein adjacent the bottom edge of said shell. Said shell and portion 200 are disposed upon a mandrel 19 shown in Figs. 9 and 10, which mandrel has a flat top surface engaged by-the bottom of member 200 or the side thereof which is upward in the finished container. Mandrel 19 has a diameter which fits snugly in the body or shell 200:.

A die is used to bend the bottom portion of the shell 20a inwardly over flange 2001 and this comprises a member 22 having a cylindrical periphery and having a flange portion 22a at its bottom having an inner cylindrical surface. Member 22 has a surface 22b extending upwardly and inwardly at an angle of substantially 45 degrees -from-thecylindrical surface of flange22a. A central cup-like member 26 is secured to the horizontal top surface of member .22, to which thesurface 22b extends by a plurality. of circumferentially spaced bolts -24' hav ing countersunk heads. Member22 is secured to.a top member '27'by a central hea'de'dbolt 28 threaded into member 27. Member 27'has a central upstanding portion which is connected by a .pin"30 to a. tubular member 31-which carries the member'27. 'Pini30 extends transvers'elyand horizontally through member 31 and the central portion of. member 27. .MemberZ'T hasa'flange 27a in which are threaded a plurality of circumferentially spacedpins 33. Pins 33 are equipped with nuts 34 at their upper ends engaging'washers 35, which in turn engage'the'top ot'flange'27a. Pins'33 extend downwardly into cylindrical'holes orpassageszinmember 22 andhavetheir lower ends at their inner portionsextending inwardly and. upwardly at an angle of approximately 30 dcgreesto thehorizontal, the outer-lower portions of said pins being rounded. Compressionlcoiled springs 36 surround the pins 33 respectively and engage the bottom of flange 27a at their upper ends and the bottomof cylindrical openings in the top of member-22 at'theiri lower ends.

"The. shell 20a withthe member'20c therein and wall of said shell extending some 'distance'beyond "flange .20cl is positioned on the mandrel, .as .shown'in Fig. '9, and the members '27 and 22 are then, moved downwardly. The -projecting portion '20alofthe shell'i firstengaged by the inclined surface 22b and is" bent inwardly, asshown in "Fig. "9. Member '26 engages thecentral portion of member 20c and upon further downward movement of member 27 against'the compression of .springs 36 the pins 33 are projected from member '22 and engage the bent over portionlflal and bend the same downwardly alongthe inside of the fiangeZflCl, .as shown in Fig. 10. Said'bent over portion 20al is moved into tight engagement with the top of the flange 2001, as shown in Figs. 2 and 10.

it hasbeen found that'by using the circumferentially spaced-pins a better operationis secured in bending over the'en'd portion of the container and'tbere is no .drawing or crimping effect on theprojectingportion of the container. Where .an annular die'is used for such albending'operation' there is a crimping'eifect on thebent over portion and it is necessary'to have agreater length in theportion of the container which extendsbeyondpflange 20d. By the method and apparatus just-described a verysmooth and-.uncrimped bent over-portion is secured. The sealing of.the shell and portionl20c is completed on the dies-shown in Figs. 18m 20 of said ctr-pending application.

The mandrel I9 is provided withpassages 1% through which air under pressure is blown to remove the container from the mandrel.

In Fig. 3 of the drawingsa view is shown somewhat similarto Fig.2 in said .co-pending application. The cross-head '65 is shown partly in section and partly brokenaway, which cross-head reciprocates vertically on the guides 125 and carries the upper die member. .The-pres entinvention'is used on themachine shownin said copending-application and the die membercomprising member.22 thenreplaces the memberil tl, as shown in Fig. 2. of said co-pending application. A crimping head 38 is shown in'horizontal section in Fig. 3. This "operates 4 on the container after the die 22. "Said head forms no part of the present invention, the same being disclosed and claimed in said co-pending application.

From the above description it will be seen that I have provided a novel and very efficient apparatus for operating on a container of sheet material such as disclosed. The apparatus operates very quicklytto-move .the .parts of the container for closing and sealing the same. The containerisitightly closed and sealed,:and:-as stated,-the machine or apparatus operateswith great rapidity. The apparatus has been amply demonstrated in actual practice and found to be very successfulra-nd efiicientandcommercial production is under way.

It will of course =be-understoodthat various changes may be made in the form, details, arrangement and proportions of the parts, without departing from the scope of applicants invention, which generally stated,.consists in a device capablev of carrying out the objects aboveset forth, in the parts and combinations of.parts disclosedand defined in the appended claims.

What is claimedis:

1. An apparatus for operating on a container of sheet material having a shell with acontinuous periphery and a cup-shaped member disposed in-saidshell-zadjacent one end thereof andforming a bottom for one end of said shell, said shell having an endextendingvertically above said member, having in combinatioma. mandrel disposed in and fitting in said shell and-having a fiat topsurface engaging the inside of said bottom,-a die axially-aimed with said mandrel having a circumferential flange .with an inner upwardly and inwardly. inclinedrsurface, a -member above said die axially alined therewithand connected thereto for moving said die upwardly and downwardly, :a pluralityof comparatively small vertically disposed and circumferentially spaced separate pins .having, rounded lower ends, said pins being secured to-saidmenrber and movable therewith, said pinsextending through and being slidablein said die, andresilient meansbetween said ;die and member whereby when said diemovesitowardsaid mandrel said upstanding vwall of saidcontainerrwillbe bent inwardly by said surface of said .diefandithenwill be engaged by said pins and movedrtoyertical position by said pins, said die beingzmovedsaway, from said member by said resilient means.

2. The structure set forth in claim -1, andsarmember carried by .said die engaging the'outer-side ofrsaidbottom and holding the same againstsaid mandrel;

References Cited in the file of thispatent UNITED STATES :.-PA.TENTS' 1,526,554 Lake Feb. 17,1925 1,833,377 Smith Nov. 24, 1931 1,843,536 Barbieri Feb.j 2, 1932 1,855,216 Bennett "Apr. '26, 1932 1,858,706 May:17,'1932 2,125,414 Baker Aug. 2, 1938 2,125,416 Baker Aug. 2, 1938 2,126,908 Moore Aug. '16, 1938 2,181,816 Mandell Nov. '28, 1939' 2,358,455 Hallman Sept. 19, 1944 2,435,560 Richens Feb; 3, 1948 2,466,341 Vergobbi Apr. 5', 1949 2,685,829 Taber Aug; 10, 195-4