US2687764A

US2687764A - Punching attachment for packing machines

Info

Publication number: US2687764A
Application number: US220908A
Authority: US
Inventors: Hauser Bertram
Original assignee: SERVIT FOODS CORP
Current assignee: SERVIT FOODS CORP
Priority date: 1951-04-13
Filing date: 1951-04-13
Publication date: 1954-08-31
Anticipated expiration: 1971-08-31

Description

Aug. 31, 1954 B. HAUSER PUNCHING ATTACHMENT FOR PACKING MACHINES Filed April 13. 1951 2 Sheets-Sheet '1' INVENTOR. Bertrand Huuser .mwu,

Aug. 31, 1954 HAUSER 2,687,764

PUNCHING ATTACHMENT FOR PACKING MACHINES Filed April 13, 1951 2 Sheets-Sheet 2 FIG.3

so as 34,

INVENTOR. Bertrand Ha user BY ATTORNEY Patented Aug. 31, 1954 PUNCHIN G ATTAGHlVIENT FOR PACKING MACHINES Bertram Hauser, Cedarhurst, N. Y., assignor to Servit Foods Corporation, New York, N. Y., a

corporation of New York Application April 13, 1951, Serial No. 220,908

13 Claims. p 1

This invention is an improved attachment for packing. apparatus; particularly apparatus for enclosing predetermined quantities of ground coffee, tea or other materials in porous bags or pouches ready for immersion in hot water, so

as to produce a quickly prepared beverage. An important object is to provide an attachment in the form of a punching device for such a machine that is capable of operating upon the material utilized for the bags or pouches, to secure thereto more effectively an outside loop or band that will enable the bag or pouch to be more easily and conveniently handled when the beverage is desired.

Pouches or bags for the purpose mentioned are fully described in the patent specification of Weisman, No. 2,377,118, dated May 29, 1945; and a machine for making such pouches or bags and simultaneously filling them with the desired contents is disclosed in the patent of Weisman, No. 2,381,091 of August 7, 1945. In that machine two strips of paper, each having the width of two such bags, are drawn into superposed positions and small masses of tea or the like are depositedbetween the two strips in rows along the two longitudinal halves of the strips. The successive charges of tea are placed at the required distance apart from one another; and the strips are then closed along portions extending longitudinally through the middle of the posited between the wider strips. But the adhesive carried by said wider strips, though completely sealing the bags or pouches along the edges, is ordinarily not sufficient to form a satisfactory union of the outside bands or loops with the bags, and the chief aim of my invention is strips, and along transverse portions between the successive masses or heaps. The strips are out along the middle and the transverse portions, to sever the bags or pouches into single detached units.

With the two strips aforesaid two narrow strips are pulled into the machine in position to extend along one of the aforesaid strips, each narrow strip being in contact therewith along the middle of one longitudinal half thereof. The narrow strips are affixed to the wider strips at said transverse portions, and cut inthe same operation that severs the bags or pouches from one another; Each bagor pouch then has an outside loop so that it can be lifted with a spoon into andout of a cup of hot water. i

The paper for the bags is thin andporous, but bears enough adhesive, preferably a thermoplastic that is not affected by boiling water, to cause the paper to adhere along the longitudinal andtransverse portions by the action of pressure and heat. The machine of patentspecifi: cation No. 2,381,091 contains parts by which such portions are subjected to heat and pressure as the charges of tea or the like are deto make the junction between the ends of the bands and the edges of the bags perfect and durable.

A further object of the invention is to provide an attachment for a packing machine that will puncture the one strip with which the narrow bands are in contact, at the places where the two wide strips are to be united along the transverse adhering portions, so that apertures are formed; and through the apertures the narrow strips make direct contact with the other strip. The wide strips are effectively joined as before, but at the punctures the adhesive onthe one wide strip is enabled to hold the band permanently. At the same time, the seal along the edge of the one wide, strip bearing the puncture and 'the other wide strip is in no wise impaired.

Another object is to provide a punching device for packing apparatus having means for affixing the narrow strips for the loops to one strip at the puncture points, to prevent displacement of the narrow strips during the filling, sealing and cutting operations.

An additional object is to provide such an attachment or accessory for a packing machine which is relatively simple in design and fully coordinated in its action with the operation of the other parts of the machine which load the tea or the like, seal the separate masses and cut the bags loose from one another.

The nature of the invention and the advantages thereof are clearly set forth in the ensuing specification and illustrated in the, drawings. But the embodiment shown is not necessarily the only construction that can be used in achieving the objects of the invention, for various changes may be made in details without altering the essential design thereof; and the characteristics are defined in the appended claims.

On said drawings: v t

Figure 1 is a diagrammatic view showing in part the general operation of packaging tea and coffee and operating the punching device.

Figure 2 shows the kind of bag or pouch em- Figure 3 is a side view of the punching attachment or accessory.

Figure 4 is an end view thereof; and

Figure is a sectional view of a detail indicating the one strip punctured and the narrow bands for the loops in place against one face thereof; seen from the lower side; and

Figure 6 is a section of what is shown in Figure 5 at the puncture points.

In Figure 1, on which the general arrangement is shown, the parts are not necessarily shown in proportionate sizes, and numeral I indicates a bin or hopper from which the tea or the like is delivered through a spout 2'. The relatively wide strips of thin porous paper between which the measured amounts are deposited are shown at 3 and 4, V the discharge from the hopper being controlled as the aforesaid specification 2,381,091 describes. The strips run down on both sides of the spout 2 over idle guide rollers 5, and are engaged and moved by feed rollers 6, adjacent the lower end of the spout or chute 2. These rollers are rotated step by step to draw the strips 3 and 4' past the chute and at brief intervals are motionless while the heat and pressure is applied to cause the paper to adhere round the successive charges of tea and seal them in place, and the cutters are operated to sever the bags from one another. After the charges are dropped into place the sealing is performed, and the cutting is done through the adhering or sealed portions of the strips around the charges already sealed and immediately in front of those which are being sealed between the strips. The step by step motion is imparted by a gear on a shaft connected to the rollers 5, and the gear is turned intermittently by a one-way action pawl on a rod that reciprocates in proper time with the sealing and cutting members; these members being fully illustrated in the drawings of patent specification 2,381,091, aforesaid.

The attachment is mounted on supports 9 affixed to the framework ofthe packing machine, not shown, and mounted in transverse position on the members 9 is a pair of flanged rollers or reels [0 bearing the narrow strips 1 to form the bands or loops on the bags or pouches. One of these is depicted in Figure 2, having two layers 3' and 4 of porous paper, sealed around the four edges, with the band or loop I joined to two of the opposite edges; one of the layers 4' having apertures 8' at its opposite edges under the ends a of the loop I. The bands 1 pass over guide rollers H in transverse positions between the supports 9 and run beneath one or the wide strips 4', which is taken from a feed roll at one end of the machine; the other strip 3 coming from the opposite end. Mounted between its ends on the members 9 is a transverse bar l2, that has apertures l3, one directly above each narrow strip 7; and above this bar is a bent arm l4 having at its'outer end a transverse blade IS with teeth [6 in position to register with the apertures l2. The strip 4 runs over the bar 12, with its center line at the center of the bar, as illus-. trated in Figure 4., which shows the bar and strips from below, and every time the bar is depressed, two apertures 8 are punched therein. These apertures are covered by the strips 1 as soon as the narrow strips 1 and the wide strip 4 come into contact with each other.

The arm I4 is a rigid bent piece of metal affixed'to the outer end of a rocker ll mounted loosely on a shaft l8 in bearings on the two members 9. To the member is secured one end of a tension spring I9, the other end being connected to one-of a pair cf uprights 20 on the 4 supports 9. In bearings 2| at the top of the extensions 29 is a transverse shaft 22 that carries a cam 23 fixed thereon. This cam engages a roller 24 on a shaft mounted in lugs 25 on the rocker member ll at its free or front end, and forces the rocker to descend whenever a punching stroke is required. On one end of the shaft 22 is a gear 26 which is coupled by a sprocket chain 21 with the shaft of one of the feed rollers 6, or some other part moving in the same way as the rollers 6. rollers are intermittently rotated, the gear 26 is also turned step by step to make the cam 23 depress the rocker IT and punch the holes 8 in the strip 4. These holes are of course as far apart as the distance between the opposite edges of the bags or pouches for which the bands or loops are intended. The cam 23 has such form that it causes the rocker; IT to make a punching stroke when the rollers G are not in motion, and releases the rocker to be'retra'cted by the spring M as soon as the rollers 6' again start revolving;

Beneath the rocker H at the frontend is a block '28 carrying a heatingcylin'der 29', and directly under this block, between the members 9 is a fixed anvil 30, containing-rubber or some other yielding substance. As the rocker IT is pushed down to punch a pair of' holesin the strip 4, the block 28 also moves down towards the anvil 30. The strip 4 with the two parallel narrow strips 1 below it passes over the anvil 30, which is as far from the bar l2'as the dis: tance between two successive holes inthe paper strip 4, and the heatenwhich is flat onit's lower face, presses the strip 4 and the strips 1' against the anvil, and causes the strips 1' to-adhe'r'e to the strip 4" tightly enough tokeep the strips l in fixed position with respect tothe strip 4fa-ll through .the remaining operations of making bags or pouches out of the strips 3" and]. The cylinder 29 contains an electricalheating uiiit, supplied with currentconductors 3|.

At the front edge of the bar I2 is a guide 32 under which the strip passestobe closeto and in central position over the bar l2; and ju'st' -iri front of the anvil 30 are g'u'id'e lo'ops 33-which are beneath the strips 1; to keep the strips 1' in proper alinement with the strip 4; I When the strip 4 and the band strips I reach the anvil 30; the pressure and heat exertedby the cylinder 29, force the edges of the holes 8 against the strips 7, as indicated in Figure 5, and'causes-adhe'siri to take place at once between the strips: T and 4'; The thermoplastic adhesive substance is prf= erably incorporated with the fibers and the" paper, and is not presentin siifiicieht amount to diminish the porosityof the paper. But the adhesive will bind the strips 1 tothe strip 4am hold the former in place till th'e' finaluni en-tr the strips 3 and'A; and of the strips 1 to the latter is performed just before the severed bagsare delivered from the machine to'be put into con tainers for selling. When the stripsfl' and 4 are subjected to heat and pr'essure after'receiv= ing tea fromthe hop er l, to seal eachcharge of tea, the portions heated and pressed stiek all r'oundthe tea, and whenthe cuttin'gis done; the two sections 3 and! of each bag stick together firmly all around the edges. But parts of the surface along the two edges of the piece 3 'di'--' rectly under the holes 8 are exposed ahd 'm'ake direct contact the" ends of the bands '1; Hence, the adhesive iii-the sections inl-ine' with the holes 8 in the section 4, takes effeet directly only on the loops Ito bind them-firmly, andtthe Hence, as the feed adhesive in the paper elsewhere than in line with the-holes 8, brings aboutcomplete adhesion along all the edges to close the bags at all points. Of

course a plastic or adhesive can be attachedto one or both

strips

3 and 4 only along the portions forming the edges of the bags, or otherwise, as maybe desired.

The mode of operation of the punching device in coordination with the packing machine which operates as set forth in the aforesaid patent specification 2,381,091, and heater 29, is indicated inFigure 1. The cam 23 can be coupled to make on e turn foreach rotation-of the feed rollers 6, or part of such rotation, depending on how far to be new is:

1. A punching device comprising a blade having one ormore teeth projecting therefrom, a movably mounted member carrying said blade fixed thereto, a heater on said member separated from said blade,,means for feeding thin porous materialbearing a thermoplastic substance to said blade and said heater, and means for actuating said member to cause said blade and heater simultaneously to engage said material.

2. A punching device comprising a blade having one or more teeth thereon, a rocker carrying said blade fixed thereon, a heater on said rocker spaced from said blade, means for feeding thin porous material bearing a thermoplastic substance to said blade and heater, a tension spring for retracting said rocker, and a cam for actuating said rocker against the force of said spring, to cause said blade and heater simultaneously to engage said material.

3. A punching device comprising a blade having one or more teeth thereon, a bar having an aperture in linewith each tooth, a movable member carrying said blade fixed thereon, an anvil adjacent said bar, a heater on the member above said anvil, means for feeding thin porous material bearing a thermoplastic substance to said blade and said anvil, and means for actuating said member to cause said blade and heater simultaneously to engage said material.

4. A punching device having a blade with one or more teeth thereon, a rocker carrying said blade fixed thereon, a bar having an aperture in line with each of said teeth, a heater on the rocker adjacent said blade, an anvil adjacent said bar in position to be engaged to the heater, means for feeding thin porous material bearing a thermoplastic substance to said blade and said anvil, a cam toactuate the rockerto cause said blade and heater simultaneously to engage said material, and a spring to retract the rocker.

5. A punching device having a blade with one or more teeth thereon, a rocker carrying said blade fixed thereon, a bar having an aperture in line with each or, said teeth, a heater on the rocker adjacent said blade, an anvil adjacent said bar in position to be engaged by the heater,

means for feeding thin porous material bearing a.

thermoplastic substance to said blade and said anvil, a cam to actuate the rocker to cause said blade and heater simultaneously to engage said material, and a spring to retract the rocker, said anvil having yielding material therein.

6. A punching device comprising supports, a pair of flanged reels each for carrying thin porous material bearing thermoplastic substance mounted on said supports, guide rollers adjacent said reels, an anvil adjacent said rollers, said material being movable to said anvil over said rollers, a bar having apertures adjacent the guide rollers, and spaced therefrom, a movable member above said bar and said anvil, a punching blade and a heater member fixed on said movable .member adjacent said bar and said anvil, means for supplying additional thin porous material bearing a thermoplastic substance to said bar and anvil, and means for actuating said movable member to cause said blade and heater simultaneously to engage the material on said bar and anvil.

'7. A punching device comprising supports, a pair of flanged reels each for carrying thin porous material bearing a thermoplastic substance mounted on said supports, guide rollers adjacent said reels, an anvil adjacent said rollers, said ma- .terial being movable to said anvil over said rollers, a bar having apertures adjacent the guide rollers, a rocker mounter on said supports above said bar and anvil, a punching blade and a heater on said rocker above said bar and anvil respectively, means for supplying additional thin porous material bearing a thermoplastic substance. to said bar and anvil, a rotatable cam for actuating said rocker to cause said blade and heater simultaneously to engage the material on said bar and anvil, and a spring for retracting said rocker.

8. A punching device comprising supports, a pair of flanged reels, each for carrying thin porous material bearing a thermoplastic substance mounted on said supports, guide rollers adjacent said reels, an anvil adjacent said rollers, said material being movable to said anvil over said rollers, a bar having apertures adjacent the guide rollers, a rocker mounted on said supports above said bar and anvil, a punching blade and a heater on said rocker above said bar' and anvil respectively, means for supplying additional thin porous material bearing a thermoplastic substance to said bar and anvil, a rotatable cam for actuating said rocker to cause said blade and heater simultaneously to engage the material on said bar and anvil, a spring for retracting said rocker, and guide means between the guide rollers and said anvil.

9. A punching attachment for a packing machine having operating parts comprising a blade having one or more teeth projecting therefrom, a bar having an aperture to receive each tooth, a movable member carrying said blade, a heater spaced from the bar on said member, an anvil in line with said heater, means for supplying thin fibrous material bearing a thermoplastic substance to said bar and anvil, means for intermittently actuating said member, and means for connecting said member to be operated by said machine.

10. A punching attachment for packing machine having moving parts, comprising a blade having one or more teeth projecting therefrom, a fixed bar having an aperture to receive each of said teeth, a heater, a fixed anvil in line with said heater, a rocker carrying said blade and heater spaced apart from each other, means for supplying thin fibrousmaterial bearing a thermoplastic substance to said bar and anvil, a cam to actuate the rocker, a spring to retract the rocker, and

57 {gear connections ,for :operating .said am -from asaidmachine.

11. A punching :device comprising mounting imembersramocker pivoted'at one end on said :members, .anparmmn theffree ;end:of said rocker, a;blade having= projecting .teethomtheendof said arm, a -:bar under ;the rocker having apertures in iline ',with;saidq,teeth supported (transversely by .asaid. :members, ,a vvblock carrying; a heater on the .rocker adjacent said; arm lspaeedifromisaid blade, camanviLsupported transversely by said members :under-athe ;heater,;.means for supplying thin fizbrousmaterial bearing althermoplastic substance -to.'saidtbar:and anvi1, :uprights on said members shaving :bearings,,a shaft zinisaid bearin s, 2 a cam ,on itheglastinamed shaft to actuate .said member 11701231188 ssaid'blade and .heater .to simultaneously lengage saidsmaterialpandla spring between one of said anprights and the :rocker :to :retract the slatter;

.1-2. ,A punching device comprising mounting rmembers, a cracker :pivoted at one ;end :on said members anarmon the free end .ofsaid member, aiblade having projecting :teeth 1011 the endrof said arm; aJbar'under; the rocket-havingapertures in iline with said eteet'h supported :transversely by said :members, a block carrying .a heater .on the rockeradjacent said iblade but. spaced -;therefrom, 'anlahvil-supported transversely by said'memhers un'cler :the, heater, means for supplying thin 11- brous material bearingzazthermoplastic substance zto =said bar and anviLand a spring'ibetvveen one of said uprights and the rocker to retract the latterflsaid anvil havingyieldin-gmaterial.therein.

,-1'3.;A-,punching device .comprising mounting imembers, a rocker ,pivoted -at -OI-1e' end on said members, {an Farm on the free end ,of said member, a .blade having projecting teeth on ,the end of said -a1:m,. a-barunderthe rocker having-apertures in line with said teeth supported trans- :verselybysaid members, ablock. carrying aheater ion --.the rocker adjacent said-member but spaced "therefrom, .an anvil supported transversely ,by ssaidmembers under the heater, means for supplying :thin fibrous material bearing a thermoplastiesubstance to said bar andwanvil uprights on said membershavingbearingsa shaft-in said bearings -a-cam on thellast named shaft'to actuate said member to cause said blade and theater simu1taneously to engage said material, and a spring between .one of said uprights and the :rocker to retract the latter, and-guide elements adjacent said -.bar andrsaid anvil.

,-References Cited in the :file of this .patent UNITED .STATES PATENTS Number Name Date 2,200,971 Sonneborn et a1. 1\/Iay-14, 1940 2,372,737 Phillips Apr. 3, 1945 $2,387,812 'Sonneborn et a1. Oct. 30, 1945 2,395,387 Fry Feb.'26, 1946 2,423,237 "Haslacher 'July 1, 1947 12,457,343 Braunschweiger Dec. 28, 1948 '2,'478;121 Morner Aug. 2, 1949 2,597,634 'Grevich May 20, 1952