Патент USA US2406018код для вставки
Allg'. 20, 1946. ‘ H, Q_ |RMS¢HER ~ .2,406,018 l - ME-THoD oF MANUFACTURING INFUsIoN PACKAGES ~ vFiled 0G12. 14, 1942 1:: :fr: rílmu nu ml m l P ‘ \\ Si HI '.INVEVNTORQ » HANS o. /QMSCHEQ - A T_Top/VEY Patented Àug. 20,> 1946 2,406,018 ' UNHTED SES FFICE 2,406,018 METHOD 0F MANUFACTURING ENFUSION PACKAGES Hans 0. Irmscher, East Hempstead, Long Island, N. Y., assigner to Nati onal Urn Bag Co., Inc., Long Island City, N. Y., a corporation of New York l Application October 14, 1942, Serial No. 461,968 5 Claims. (Cl. 93_3) This invention relates to the manufacture of ñlled containers or bags, and more particularly is directed Ito infusion packages, such as tea-balls with handles and like articles of manufacture. Among the objects of the invention is to gem erally improve the construction of ñlled con tainers or bag-s in the form of infusion packages With handles as inexpensive articles of manufac ture, which shall comprise few and simple parts, „. which shall be easy and cheap to manufacture, which shall be capable of quantity production on automatic super high-speed packaging machines, which shall have pressure heat sealed joint seams forming an improved attachment connec tion of a string handle with the bag portion of each package, and which shall be practical and eñicient to a high degree in use. Other objects of the invention will in part be obvious and in par-t hereinafter pointed out. The invention accordingly consists of features of Acon structions, combinations of elements, arrange? ments of parts which will be exempliñed in the constructions and method hereinafter described and of which the scope of the application will be indicated in the following claims. In the accompanying drawing in which are shown various possible illustrative embodiments of this invention. Z lamina. Where ñlter paper is used as sheet ma terial II, the base layer is made of vegetable ñbrous pulp stock which is coated with the dry porous lamina, so lthat when made into tea-ball bags Illa has suñicient wet strength to withstand immersion in boiling water without damage or disintegration and without loss of tensile strength. Bags Illa of tea-balls I0 made of Said filter sheet material Il permits ready infusion and must have such composition that it is in soluble in hot water, produces no toxic eifects, and imparts no odor or taste even to the slightest degree to the brew. The bag Ita of the tea-ball Ill for economy may be produced on a super high output tea ball manufacturing machine such as described and shown in applicant’s copending application, Ser. No. 450,289, ñled July 9, 1942, for Infusion package manufacture, and may comprise mate rials assembled and heat sealed as shown and de scribed in said applicant’s aforementioned appli cation with the addition of providing a string handle i2 in the manner hereinafter set forth. When coated ñlter paper is used as sheet ma terial I I, it has been found in practice that a 61/2 pound ñbrous stock sheet of approximately _001 inch thick of high wet tensile strength forms a practical filter paper base layer for Ithe pur-v poses described herein. On such layer ñnely Fig. 1 is a View showing a method embodying the invention as applied to the manufacture of 30 powdered copolymer of vinyl chloride and vinyl tea-balls. acetate may be uniformly sprinkled or sprayed, Fig. 2 is a view as seen from lines 2_2 in “partially fused” by heat to 60° C., and pressure Fig. 1. rolled thereon for providing a pervious, dry and Fig. 3 is a front elevational view of a com extremely thin coating or lamina which does not pletely manufactured tea-ball and string handle embodying the invention. materially affect the filtering capacity of said layer. Approximately three ounces of such vinyl Fig. 4 is a cross sectional View taken on lines powder for each pound of said layer will form a 4_4 in Fig. 3. porous coating or lamina of normally less Ithan Fig. 5 is a View showing a variation of Ithe im .0005 inch thick. proved method of manufacturing tea-balls em 40 Tea-ball bags Ilia when constructed of the bodying the invention, and Figs. 6 and 'l are sectional views taken on lines aforementioned sheet material II have the lamina or coating side of the filter material II as the interior surface of the tea-bali bag Illa. The edge seam joints Ißb and top seam closure a tea-ball completely manufactured and con 45 Iiic of said bag Ilia for enclosing .the con-tents 'I' structed to embody the invention. are then formed by having the coating surfaces In practising the embodiment of the invention placed in face to face relation, pressure heat shown in Figs. lto 4 inclusive, heat sealing sheet sealed into permanent adhesion. With said coat material Il may be used in making a bag Ißa of ings formed of copolymer of vinyl chloride and said tea-ball I0 in which the contents T is en 50 vinyl acetate permanent sealing fusion of said closed. Said heat sealing sheet material II may joints IIIb and closure Ille will take place when be of any suitable foraminous construction, such pressure heat sealed at about 130° C. as filter paper, ñnely perforated parchment or 8_6 and 'I_l, respectively, in Fig. 5. Referring in detail to the drawing, I!) denotes The present invention is directed particularly Cellophane, cotton gauze and the like layer base to the manufacture of tea-balls I I) with perma treated or coated with a dry thermosetting plastic 55 nently attached string handles.` When coated 2,406,018 4 before the top sealed closures Ilûc are applied, the string handle I2 is formed into the sinusoid or heat sealingl filter sheet material II is used in machines such as described in my said copending application, Ser, No. 450,289, such sheet material wave-like configuration in the same manner as described above, while the unit sections are being formed and filled, and the bights 12a are inserted only to a depth to the top ends of partitions joints ilile after which the top closures are heat I I is fed from a suitable supply as a continuous strip or web and while continuously travelling through is folded centrally thereof to provide a longitudinally extending bottom fold lod. Said web While being folded is engaged by a series of sealed with joints I Hic permanently anchoring the bight portions of the string handle. Thereafter, spaced movable pincer jaws, indicated in Figs. 1 and 2 in dotted lines at J to provide section 10 one or more leading sealed section units, each with a handle I2 may be severed from the moving units which are filled with uniform quantities of web for providing the tea-ball Hii with a string tea T by suitable measuring device (not shown) bail handle l2. in any well understood manner through the top It is thus therefore seen that there is provided openings of the bags before the same are heat sealed. Said bag top openings of the section m an improved method of manufacture and an ar ticle in which the objects of the invention are achieved and which are well adapted to meet all conditions of practical use. As various possible embodiments may be made in the above invention and as various changes might be made in the embodiments and method above set forth, it is understood that all the above units are then permanently heat sealed as at closure Hic, spaces S being left unsealed between each of said section units. To provide a string handle for each unit section in practising the invention, a continuous length of string is formed into sinusoid or wave-like con iiguration having a series of looped handle portion l2 alternately disposed with relation to a series matters here set forth or shown in the accom panying drawing are to be interpreted as illus of bights lia by means of suitable spaced pins P, so constructed and arranged as to engage one or ~ , trative and not in a limiting sense. more of string portion forming said bights ifa, the latter being inserted into the moving folded web through the unsealed portions S at the top as new and desire to secure by Letters Patent: l. in a method of manufacturing of the char Thus having described my invention, I claim acter described, the steps of continuously moving openings of the unit sections, as shown in Figs. l and folding a strip of heat sealing bag sheet ina terial to form spaced apart filled section units with closed bottoms, arranging a string in wave-like configuration with alternate loop and bight por and 2. The successive bights No remain in their . inserted position > between the unit section of folded web when the pins P are withdrawn. I'i‘hen suitable pressure heat sealing means (not shown) tions, inserting said bight portions into the sheet material between the section units, heat sealing said sheet material about each section unit for permanently embedding the inserted string bight portions in seam joint portions between said sec tion units, and severing said seam joint and the are applied in any well understood manner to per manently heat seal partition joints ille between the unit section thereby embedding the portions of the string forming the bightgl I2a therein all While the filled unit section formed from said web is kept moving or travelling through machine. One or more of the leading section units are then 40 bight string portions embedded therein centrally for completing successive individual packages severed from the leading end of such travelling each with loop string handle portion havin-g the web by a suitable knife or cutter K so as to leave ends thereof permanently anchored in oppositely positioned 'neat sealed joints of each package to complete individual tea-balls lil with attached string bail handles i2 as shown in Fig. l. It is to be uriderstood that the portions ef the i provide a bail handle. . 2. The method as defined in claim i in which string handle forming the bights 12a embedded into the heat sealed partition joints ille may eX tend any suitable distance within said sealed par tition joints in order to assure positive attach ment anchorage. «As shown in Figs, 1 and 3, the said steps of arranging the string and inserting the bight portions are carried out concurrently with the steps of forming the ñlled section units. 3. In the method of manufacturing packages formed with spaced heat sealed seam joints, the steps of arranging a string with alternate loop and bight portions in wave-like configuration, in portions forming the bights Ira extend through , a great part of the length of the partition joints liie, the ‘nights IEa and the partition joint hie being severed by the cutter K centrally at their midportion leaving the edge joints seal at lßb in tact. The portion of the strings embedded in each serting the string bight portions within successive joints prior to the heat sealing thereof, heat seal ing and severing the heat sealed joint and each bight portion to form a bail handle of said string loop portions with a split bight portion anchored of the severed joints lilb is formed of a sein-i bight 12o which extends to the edge of the joint Ißb. Preferably the surfaces of heat sealed par in a split portion of the heat sealed joints on in dividual packages cut off by the severing opera gated as shown to increase the bondages of said tion. joints and improve the appearance of the finished 4. In a method of the character` described, the tea-balls lil. The bail handle l2 provided on each steps of making a series of connecting bags tea-ball l0 is non-tangling to facilitate packing _ formed with heat sealed seam side joints of uni for shipment and for dispensing when used, and form width extending thereabout, filling said requires no alteration in the tea-ball structure bags, arranging in wavelike Configuration a string by the user for making the suspension package with relatively large Vloops and narrower bight handle available for the brewing operation. portions spaced therebetween, inserting the Where the invention is practiced in connection spaced bight portions of said arranged string in with other forms of high speed tea-ball making 70 position between the bags, and heat sealing a top machines such as those operating, as for example, closure seam joint to incorporate said bight por as shown in Figs. 5, 6 and 'î where the travelling tions for permanently anchoring same, and split folded web is first heat sealed with the spaced ting said side joints ‘centrally to provide a looped partition joints I Iûe forming successive unit sec bail handle extending across the width and be tions> which are ñlled with the tea or the like T tition joints iûe and closure ißc may be corru 69 5 2,406,018 . 6 yond each bag a sufficient distance to serve as a iinger gripping means. 5. A method of making tea-balls which com short of the length thereof, heat sealing said joints to embed the bights in said position, and splitting prises placing heat sealing ñlter paper in face to length of each and cutting the embedded bights to terminate each in a curved end at the edge of said seam joint leaving the closure thereat intact with said curved ends of the cut bights permanently anchored in successive split seam joints to pro vide a succession of tea-balls With tagless bail 10 handles. face relation and forming a series of section units of bags having uniformly spaced joints with a charge of tea in each bag unit between said joints, arranging a string in wave-like configuration with alternate loops and bights so that the loops extend beyond the bag units a suñîcient distance to pro said last mentioned seam joints centrally along a vide a finger gripping means and the bights in serted in position between said units in said joints HANS O. IRMSCHER.