US3188925A

US3188925A - Method of making bag structure

Info

Publication number: US3188925A
Application number: US232907A
Authority: US
Inventors: Albert B Mojonnier
Original assignee: Individual
Current assignee: Individual
Priority date: 1961-11-08
Filing date: 1962-10-24
Publication date: 1965-06-15
Anticipated expiration: 1982-06-15

Description

June 15, 1965 A. a. MOJONNIER 3,188,925

METHOD OF MAKING BAG STRUCTURE Original Filed Nov. 8. 1961 2 Sheets-Sheet 1 mmvron 4455/27- 5. MOJOA/A/IEZ 2% QM L Arron/5Y5 June 15, 1965 A. B. MOJONNIER 3,188,925

METHOD OF MAKING BAG STRUCTURE Original Filed Nov. 8. 1961 2 Sheets-Sheet 2 (F/XED) INV EN TOR. 14L 55/2775. MOJOA/A/IEE fimii, u u 4 4v Mas Arrow/5Y5 United States Patent Office 3,188,925 Patented June 15, 1965 3,188,925 METHQD OF MAKING BAG STRIHITURE Albertli. Moionnier, 5357 N. East River Road, tChicago, Ill.

Original application Nov. 8, 1961, Ser. No. 151,060. Divided and this application Get. 24, 1962, Ser. No. 232,907

3 Claims. (Cl. 9335) This invention relates to a method of manufacturing bags and the like having opening and closing means of the tin-tie type and is a division of my application for Patent Serial No. 151,060, filed November 8, 1961, noW abandoned.

This invention also has reference to bags of the described type particularly adapted for use in the dairy industry for holding milk samples preparatory to making laboratory tests of the milk.

Heretofore bags of this type have been objectionable either because they failed to promote the desired sanitation in their use or because of high cost of manufacture. I 'The primary object of this invention is to provide an improved method of manufacturing bags of thi kind which will meet the desired sanitation requirements and which may be manufactured at a comparatively low cost.

Other objects and attendant advantages will be appreciated by those skilled in this art as the invention becomes better understood by reference to the following description and the accompanying drawings, in which:

, FIGURE 1 is a perspective view of a bag structure of the kind manufactured by a method embodying my invention, showing an end strip partly torn oif;

FIG. 2 is a perspective view of the bag, opened;

FIG. 3 is enlarged top view of the opened bag;

, FIG. 4 is an enlarged detail section taken on the section line 4-4 of FIG. 1;

7 ,FIG. 5 is a diagrammatic view of apparatus employing a method of making said bag according to my invention;

FIGS. 6 and 7 are views showing successive steps in the method, described hereinafter; and

FIG. 8 is a diagrammatic view showing assembly of the tapes and bag. My invention is applied in the manufacture of a bag structure characterized by an improved opening and closing means having pull tabs formed integrally with deformable trips which in one form or another are typical of the so-called tin-tie type of fastening. In a preferred embodiment of the invention I form these pull tabs as a part of the adhesive strips which are applied to opposite sides of the bag. And by forming the pull tabs the entire width of the adhesive strips I obtain comparatively large projecting tabs, each of which may be easily grasped between a thumb and finger and pulled in opposite directions to open the bag.

My invention also contemplates a novel method of making these pull tabs in a sequence of simple operations which promote accuracy and low cost of manufacture. This method, as described more fully hereinafter, involves the conception of using an air blast and a die structure such as coacting jaws functioning automatically whereby the air blast acts against the adhesive side of the tape to bulge the tape into an area between the jaws and whereby these jaws or forming dies may be closed against the non-adhesive side of the tape to bring the adhesive sides of the bulged portion into contact and form a pull tab having non-adhesive sides projecting from the non-adhesive side of the strip.

Referring to the drawings, the bag designated generally by reference numeral 11 may be of any size and 'material suitable for the use to which the bag or receptacle is intended. For holding liquid such as milk I use a plastic film such as polyethylene. In this particular use the bag is of normally flat tubular form. It is closed at all edges and perforated along a line 12 to permit tearing off an end strip 13 preparatory to opening the bag. With this construction the bag is made sterile and the end strip may be torn off as indicated in part in FIG. 1, whereupon the

tabs

14 and 15 may be pulled apart to open the bag as shown in FIG. 2. This construction permits opening the bag without putting fingers into the bag or otherwise contaminating the interior of the bag. The attendant may then hold the open bag by grasping one or the other end tabs 16-17 with one hand or supporting the bag with these tabs resting on spread fingers of such hand. With the other hand the attendant may use a suitable dipper for picking up a small sample of milk and pouring it into the mouth of the open bag. The bag may then be closed by pulling in opposite directions the tabs 16-17, folding over a number of times the entire fastening on the bag, and folding in the end tabs 16-17 to lock the bag closed, as is well known in this art.

In this embodiment a strip of adhesive tape is applied to each side of the bag, as

strips

19 and 20. To one side only of the bag i applied a strip 21 of deformable material, preferably of ductile metal or the equivalent, which will retain the shape to which it is bent. The strip 21 extends to the ends of the tabs 16-17. In this form the strip 21 is applied beneath the adhesive strip 19 and the latter holds the strip 21 in position because it is of greater width and its marginal edge portions are adhered by the adhesive to the outer face of the bag. Similarly, the adhesive strips are united at the end tabs 16-17.

Referring now to FIGS. 5 to 8, I have shown somewhat diagrammatically an apparatus for automatically assembling the described bag from units such as a bag 11, strips of adhesive tape 19-29, and a strip of ductile metal 21. A strip such as 21 may, however, be used with each adhesive tape, although in practice I find that application of a strip 21 to one side only serves the purpose when the bag is used for sampling milk. This apparatus provides for continuous manufacture, that is, step by step operations automatically controlled and in proper sequence to produce in successionthe desired bags.

The adhesive tape 19 is taken from a roll 22, the tape 2% from a corresponding roll, and the metal strip 21' from a roll 24-. The tape 19 passes across a pair of forming dies such as a fixed jaw 25 and a movable jaw 26, then around a first guide roller 27 (where the metal strip 21 is joined with the tape), then around a second guide roller 28, and then to an assembly station shown in FIG. 8. The metal strip 21 passes from the roll 24 around suitable guide rollers 29-30 and thence to the adhesive side of the tape 19, whereby the two strips are united and move as a single strip to the assembly station where this strip is applied to a bag. The roll 22 and the movable jaw 26 are operated in timed sequence in conjunction with an air nozzle at 31 to produce a succession of pull tabs 14 at spaced intervals. Suitable mechanisms may be provided for this purpose. In the present embodiment the mechanism is used in conjunction with a machine of the punch press type (not shown) having a reciprocating ram or plunger which usually operates dies or other parts in the performance of a given job operation. Here a rodlike member 32 is reciprocated in a vertical plane by operation of the punch press ram. The member 32 connects through a pin 33 and slow 34- to a support lever 35. which carries the roll 22 and is fulcrumed at a fixed point 36. Lever 35 is adapted to contact a fixed pin 37 for a purpose presently described. An arm 33 is pivotally connected at 39 to the upper jaw 26 and. at 4% to a spring loaded link 41. The link 41 is pivoted intermediate its upper, open position.

ends at a fixed point 42; and a nected tothe short end of the link yielding urges the'link to turn in'a counterclockwisedirection around its pivot point 42 until limited by contact of its lateral projection t-against the top 'of the arm v31$. Thefarm 38 is ar contractile spring 43 con to operate the described apparatus in successive operations such as the successive downward and upward strokes ranged to. contact a fixed pin 45 and to be contacted by'a pin 46 on .the member 32, as will b'efpresently described The jaw 26,is suitably guided f-or'vertical movement with relation to the fixed jaw 25 by meansof guide pins 47. An expansion spring? 48 urges the movable jaw'to its The operation is as to a position such as showndotted at 49'determined by the support striking 25-26 are open and a blast of air from the nozzle 31 is tape 19, forcing the V jaws, as indicated in dotted lines in FIG. 5. .This operation brings into the open jaws a length of tape sufiicient to form a pull tab, it being observed that there are side portionsjto thisbulged-in'tape portion, that the air blast operates against the adhesive inner side the non-adhesive side is engaged against thefaces of the 7 follows: Upon downward movements of the member 32 the support 35 lowersthe tape roll 22 r the fixed pin 37. I This produces a slack in the tape between the points Aiand B. At this, point the jaws thereof, and that of a punch press plunger, that-the apparatus will be connected to function in timed relation with such punch press operation, and that the bag-swillbe completed in succession, oneat each such operation; This, however, is a 7 preferred assembly whichpromotes economy in cost of manufacture of the bags, but it should be understood that m invention is not limited to operation by a punch press. Instead, any suitable mechanism may be employed to operate the parts in the timed relation described.

It should also be understood that theterm bag is used to denote anyreceptacle to whichtheItin-tie' type .of

opening and closing means is adapted, also that such bag receptacles are adapted for uses other than holding milk 7 samples. They may be used for holdingor packaging directed against'the adhesive side of the slack tape into the area betweengthe' many other liquids, commodities,'andarticles.

, It. will be apparent, therefore, that changes may be made indetails of the bag structure and'in the steps or sequence of operationwith respect to, the method without departing from the spirit'and scopeof the invention as set forth in the appended claims; in which Ilclaim; Y

v 1. A method of makingabag having opening andclosjaws which serve in'eifect asfo'rmi ng dies. Uponfurther downward movement of the member 32 the pin 46 strikes 7 the arm 38 and lowersit to'the position shown in'FIGQ 6,

ing ,meansof the tin-tietyp'e, including passing an adhesive tape to a tab-forming station having open tabforming jaws, the strip having an' adhesive side and a non-adhesive side causing a[slack in the tape at said thereby forcing'the jaw 26 down and squeezing the interposed side portions of the-tape between the jaws and into adhesive contact, thereby forming a pull tab 14;" Upon further downward movement of the member 32 the-pin 46 moves the arm 38 in'a'clockwi'se direction about the V, fixed pin45, thereby opening-the jaws, as shown 'in' FIG;

7. With the tab 14 thus released the tap'e 19 will'be advanced automaticallyby suitable means and made ready station, j means acting against the adhesive side of the tape to deflect a portion of the tape into thearea between eaid jaws with the non-adhesiveside against the jaws, closing the jaws topress together into adhesive contact said deflected portion of the tape, thereby forming a pull tab extending from the non-adhesive side of the tape,

for the next'succee'ding operation, that is, arepe'tition of. a 2

l the sequence just described; p i

' Apparatus similar to that described is jappliedto the 7 lower tape'20 except that, in this embodiment, a metal strip similar to 21 is omitted; The upper and lower apparatus may be connected in timed relation by links 52-51 and a rocker arm 52. Thus, the lowertapeztl with'its I 7 tabs 15 is guided by suitable meanslsuch as'rollers 27 -28 into parallel relation with the combined tape 19, and metal strip 21, as shown in FIG; 5. The top and bottom tapes are thusguided to the above-mentioned assembly station: illustrated diagrammatically in FIG. 8; Here the bag 11 is interposed between the tapes in the relationship shown in FIG. 1, that is, with'the tapes adjacent to the mouth etlect adhesion of the tapes tothe bag andadhesion-of the'end tabs. The plunger headwill be operated insy nchronism with the member 3-2 so that at each operation a bag is completed. At the same time a completed bag 55 will'be cut off by suitable cutting means not shown."

From the foregoing it will be observed that upon each downward stroke of member 32 a given length ofadhesive.v tape 19 is provided at the tab-forming station, a tab is 7 formed by closing the jaws 25-26, and the jaws are opened render the bag; At this station aplunger head 53 will" be pressed down, forcing the interposed tapesand bag" together against a fixedbase 54 with sufiicient pressure to. I v v to release thetab. Following the downstroke ofmem-;

ber 32 the adhesive tape is advanced, thus withdrawing the tab from between thei'forming jaws and advancing it' In this embodiment the several steps to theassembly station.

to the .bagassembly station.

tape is advanced These functions take place rapidly in conjunction with applyingtthe air blast, thus promoting economy in cost of manufacturer 1 c It will be understoodthat suitable means will be used moving'the tape to position its tabportion at an assembly station withi the vadhesive side. of the tape facing a bag positioned vat said "assembly v station in, parallel relation with: said'tab portion of the tape, and causing said tab iportion'o-f the tape to be pressed into adhesive contact with the bag at said assembly station. I

p 2. A method as set, forth in claim 1,;inclu'ding' feeding a strip of ductile metal into adhesive union witli the adhesive side'of the firstmentioned strip after atab has been. formed thereon, causing said ductile meta-l strip to be advanced with the adhesive strip'to, said assembly station, passing a second adhesivestrip across a tab-forming station and forming a pull tabon such strip in the manner described with reference to the first mentioned adhesive'tape, movingthe, second adhesiveetape to an assembly position-with its tabport-ion, at the side of the bag opposite from the .firs'tmentioned adhesive tape and with ,its'adhesive side facing the. bag, and causing the, second adhesivetmember to be'p ressedinto adhesive contact with thebag at the time theIfirst mentioned adhesive tape is sopressed. e e

. 3. A method as setfoi'th in claim 2 .in which the describedldeflection o-fthe tape is eifected by an air blast acting againstthe adhesive sideof said tape.

7 References Cited by the Examiner UNITED STATES PATENTS FRANK E BAlLEY, Primary Examiner.

Claims

1. A METHOD OF MAKING A BAG HAVING OPENING AND CLOSING MEANS OF THE TIN-TIE TYPE, INCLUDING PASSING AN ADHESIVE TYPE OF A TAB-FORMING STATION HAVING OPEN TABFORMING JAWS, THE STRIP HAVING AN ADHESIVE SIDE AND A NON-ADHESIVE SIDE, CAUSING A SLACK IN THE TAPE AT SAID STATION, MEANS ACTING AGAINST THE ADHESIVE SIDE OF THE TAPE TO DEFLECT A PORTION OF THE TAPE INTO THE AREA BETWEEN SAID JAWS WITH THE NON-ADHESIVE SIDE AGAINST THE JAWS, CLOSING THE JAWS TO PRESS TOGETHER INTO ADHESIVE CONTACT SAID DEFLECTED PORTION OF THE TAPE, THEREBY FORMING A PULL TAB EXTENDING FROM THE NON-ADHESIVE SIDE OF THE TAPE, MOVING THE TAPE TO POSITION ITS TAP PORTION AT AN ASSEMBLY STATION WITH THE ADHESIVE SIDE OF THE TAPE FACING A BAG POSITIONED AT SAID ASSEMBLY STATION IN PARALLEL RELATION WITH SAID TAB PORTION OF THE TAPE, AND CAUSING SAID TAB PORTION OF THE TAPE TO BE PRESSED INTO ADHESIVE CONTACT WITH THE BAG AT SAID ASSEMBLY STATION.