US3899599A - Infusion bag, particularly for tea - Google Patents

Infusion bag, particularly for tea Download PDF

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Publication number
US3899599A
US3899599A US382885A US38288573A US3899599A US 3899599 A US3899599 A US 3899599A US 382885 A US382885 A US 382885A US 38288573 A US38288573 A US 38288573A US 3899599 A US3899599 A US 3899599A
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Prior art keywords
bag
scribe line
strip
infusion bag
extending
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Expired - Lifetime
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US382885A
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English (en)
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Adolf Rambold
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Individual
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Priority claimed from DE19722236616 external-priority patent/DE2236616C3/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/804—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package
    • B65D85/808—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package for immersion in the liquid to release part or all of their contents, e.g. tea bags
    • B65D85/812—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package for immersion in the liquid to release part or all of their contents, e.g. tea bags with features facilitating their manipulation or suspension

Definitions

  • ABSTRACT This disclosure relates to an infusion bag for an infusible substance such as tea or the like comprising a porous-walled container having a head portion reinforced by a flexible strip having two side pieces which extend on opposite sides of the bag.
  • At least one of these side portions extends over the entire length of the bag and includes at least one longitudinally extending scribe line adjacent the respective lateral edge of the side piece, and another scribe line extending perpendicular to and intersecting the at least one longitudinally extending scribe line. Consequently, tearing of the scribe lines will permit a portion of the side portion to be spatially separated from the remainder thereof while remaining connected thereto as a hanger by means of at least one narrow web defined between the at least one longitudinally extending scribe line and its respective lateral edge, and wherein the hanger includes at least one cut defining an aperture which facilitates connection of the hanger to a pour spout of a pot.
  • the invention relates to an infusion bag with at least one chamber, containing in particular tea, the head of which is reinforced by a flexible strip which forms two side pieces which are folded together, and are attached to and hold between them the head of the bag, for pots having a pourer spout.
  • a single chamber infusion bag for tea having a thread and a hanger has become known, such a bag having, though not extending over the entire width of the bag, an over-hanger in the form of a folded-together strip with two equally long side pieces which fit over the head of the bag.
  • One of the two side pieces is, in the vicinity of the fold line of the strip, provided with a hole through which the thread is passed.
  • the actual bag Prior to infusion, the actual bag is separated from the over-hanger which is held on the thread by the hanger. After infusion, the bag is withdrawn from the prepared tea by the hanger, for which one hand is required, and the other hand only has to try to push the over-hanger over the distended bag.
  • the known infusion bag moreover has the disadvantage that, by reason of the attachment of the thread and hanger, it is expensive to manufacture and requires a packaging machine which is complicated and therefore expensive and the productivity of which is relatively low by reason of the many working steps involved.
  • the invention is, therefore, based on the problem of providing an infusion bag, the manufacture of which proceeds more rapidly due-to the elimination of some of the working stages and which requires less mechanical complication and which, by virtue of the saving on material, is cheaper than hitherto, so that the costs involved are altogether reduced.
  • this problem is, according to the invention, resolved in that at least one of the side pieces covers the bag over its entire length and is provided with at least two prestamped tear lines disposed parallel with or at right-angle to each other, of which at least one extends parallel with one longitudinal edge of the side piece to a point close to the transverse edge thereof, so that a hanger is formed which is connected to the bag head through at least one narrow web, can be removed from the bag head by being torn therefrom and can be connected to the pourer spout of a pot.
  • the hanger may be provided with a U-shaped cup. The narrow web or webs for connecting the bag head to the hanger prevents the actual bag becoming submerged in the pot so that it cannot be withdrawn at the right time.
  • the cost of manufacturing the infusion bag according to the invention is greatly reduced because thread and separate hanger can be dispensed with, because the strip having two side members serves not only as a label, but one of its side members serves as a hanger for attachment on a pot.
  • the infusion bag according to the invention can be relatively quickly produced on a considerably simplified packaging machine, the output of which is therefore far greater than the output of known packaging machines for the known infusion bags. It is true that an infusion bag for glasses, corresponding to the infusion bags of the type mentioned at the outset, is already known from U.S. Pat. No. 2,192,605 in which at least one of the side pieces of a plastically deformable strip covers the bag over its entire length.
  • This or both side pieces can be raised and, at their free end, shaped into a hook which can be hung over the rim of the glass.
  • relatively expensive materials such as metal foils and synthetic materials may be used and their use in pots is not really feasible.
  • FIGS. 1 and 2 are perspective views of a first embodiment viewed from two different directions;
  • FIG. 3 is a perspective view of the first form of embodiment in a pot during infusion
  • FIGS. 4 and 5 are perspective views of a second form of embodiment, from two different directions;
  • FIG. 6 is a perspective view of the second embodiment in a pot during infusion
  • FIG. 7 is a perspective view of the second embodiment in a glass during infusion.
  • the first form of embodiment according to FIGS. 1 to 3 is intended for pots.
  • An elongated rectangular strip 420 is so folded along a fold line 422 that two unequally long side pieces 424 and 425 are formed, of which the shorter side piece 425 defines the length of the handle 431 and is at its free end attached by an attachment clip 432 on the head 430 of a bag 428 disposed between the two side pieces and covered on one side by the longer side piece 424. Since the bag 428 is only protected on one side, the first form of embodiment is suitable only for relatively large packaging units which have their own packing.
  • the longer side piece 424 has, extending from the fold line 422 to a point close to the transverse edge 434 of the side piece and parallel to the right-hand longitudinal edge 464 thereof, being disposed closely alongside this latter, a first prestamped tear line 478 and, between the free end of the side piece 424 and the clip 432 and alongside this, extending parallel with the transverse edge 434 from the left-hand longitudinal edge 438 of the side piece 424 as far as the first scribed line 478, a second prestamped scribed line 480. Furthermore, the side piece 424 has three straight cuts in it in the form of an I, 482, two of the cuts extending parallel with the transverse edge 434 while one extends parallel with the longitudinal edges 438 and 464.
  • the two scribed lines 478 and 480 form a hanger 484 which, as indicated by broken lines in FIG. 1, can be folded away, being then only connected to the shorter side piece 425 through a narrow web 486 bounded by the first scribed line 478 and the right-hand longitudinal edge 464. If it is intended to be infused in a pot 474, the separations provided are effected along the two scribed lines 478 and 480 and the hanger 484 which is thus formed is slipped over the pourer spout 476 of the pot, the spout passing through-the aperture created by the cut 482. As FIG. 3 shows, after infusion, the bag 428 can be withdrawn from the pot 474 by means of the hanger 484 which is detached from the pourer spout 476. v
  • the second :form of embodiment as shown in FIGS. 4 to 7 is a further development of the first embodiment, to provide a universal bag.
  • the second scribed line 580 does not reach as far as the left-hand longitudinal edge 538 of the side piece 534, but only as far as a third scribed line 588 which extends parallel with the left-hand longitudinal edge 538 and at a small distance therefrom, the third scribed line 588 commencing at the fold line of the strip 520 and being of the same length as the first scribed line 578.
  • the hanger 584 is connected not only by the web 586 known already from the first form of embodiment but also by a second web 590 to the other side piece 526 of the strip 520 which is constructed as the same, length as the side piece 524, so that, prior to use, the bag 528 is covered on both sides.
  • a first cut 594 extending obliquely to the fold line 522 of the strip 520 extends from this line in both side pieces 524 and 526 and furthermore, there is in the side piece 526, extending in the longitudinal direction between the clip 532 and its free end a second cut 596 through which it is possible to push the corner 598 of the strip 520, formed by the first cut 594, as shown in FIG. 7, when the side piece 526 is raised. If the bag 528 is being brewed in a glass or a cup, naturally the hanger 584 ought not to be detached from the side piece 524. After infusion, the bag 528 can then be squeezed out between the side pieces 524 and 526.
  • the strips are expediently made in one piece from water repellant material, for example, from impregnated paper or from paper lined at least on one side with a synthetic plastic film.
  • the strip can be welded on the bag head so that a fixing clip becomes unnecessary.
  • the strip can also consist of filter paper which is permeable to liquids yet will not dissolve therein, the character of which is adapted to the material of the bag.
  • the fold lines to facilitate folding can be provided unless a prestamped scribed line is already provided.
  • An infusion bag containing an infusible substance comprising a porous-walled container for the infusible substance, said container including an elongated head portion and at least two sides, a strip of non-porous sheet material secured to said head portion and folded about said container along a line extending substantially parallel to said head portion, said strip including side portions having lateral edges and extending from said fold line on opposite sides of said container, at least one of said side portions extending over substantially the entire length of said container adjacent the respective side thereof, said at least one side portion including a first prestamped scribe line extending parallel to said fold line, at least one additional prestamped scribe line extending from said fold line adjacent and parallel to one of said lateral edges and running over a predominant portion of said at least one side portion, said at least one additional scribe line intersecting'said first scribe line and defining therewith, when said sheet material is cut along said scribe lines, a hanger having means adapted to be connected to a pour spout of a pot, said hanger remaining
  • An infusion bag with at least one chamber containing an infusible substance said bag comprising a head portion having a single fold at the edge forming the bag opening, said head portion being reinforced by means of a flexible strip attached at a point to and encompassing the entire width of said head portion, said flexible strip being folded about both sides of said bag along a fold line and having at least one'side piece which extends over the entire length of said bag and terminates in a free end, said at least one side piece having lateral edges and a transverse edge at said free end, one of said at least one side pieces having at least one prestamped scribe line running parallel to at least one of said lateral edges and extending substantially from said fold line over a predominant portion of said at least one side piece to a point spaced from said transverse edge, another prestamped scribe line extending perpendicular to and terminating at said at least one prestamped scribe line and extending along a substantial portion of said head portion, said scribe lines defining, when said strip is cut therealong, a hang,
  • said at least one side piece comprises two side pieces extending on opposite sides of said bag, and wherein one of said side pieces has a prestamped scribe line extending completely from one lateral edge to the other located between its point of attachment to said head portion and its respective transverse edge, whereby tearing of said completely extending scribe line will permit removal of a substantial portion of said one side piece prior to insertion of said bag in a pot.
  • said means for securing includes a first cut extending obliquely from said fold line of said strip through both side pieces thereof which defines a corner when bent out of the plane of said strip, and a second cut extending longitudinally through said one of said side pieces, whereby folding of said one of said side pieces back along said folding line will enable said corner to be inserted through said second cut.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Apparatus For Making Beverages (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Bag Frames (AREA)
US382885A 1972-07-26 1973-07-26 Infusion bag, particularly for tea Expired - Lifetime US3899599A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722236616 DE2236616C3 (de) 1972-07-26 AufguBbeutel, insbesondere für Tee

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US3899599A true US3899599A (en) 1975-08-12

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US383039A Expired - Lifetime US3895118A (en) 1972-07-26 1973-07-26 Infusion bag
US382885A Expired - Lifetime US3899599A (en) 1972-07-26 1973-07-26 Infusion bag, particularly for tea

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US383039A Expired - Lifetime US3895118A (en) 1972-07-26 1973-07-26 Infusion bag

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US (2) US3895118A (it)
JP (3) JPS4952062A (it)
AT (1) AT331711B (it)
CH (3) CH565687A5 (it)
FR (1) FR2194186A5 (it)
GB (2) GB1388366A (it)
IT (1) IT997280B (it)
NL (3) NL7310111A (it)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4110955A (en) * 1975-07-02 1978-09-05 Adolf Rambold Infusion bag and method of packaging infusion bag
US4465697A (en) * 1983-06-14 1984-08-14 Brice Ilotan Research Corporation Coffee brewing apparatus and method
WO1986003176A1 (en) * 1984-11-20 1986-06-05 Hugh Patrick Christie Tea bag with a protective cover
US4602557A (en) * 1984-07-13 1986-07-29 John Yip Liquid brewing cup
US4605123A (en) * 1983-12-15 1986-08-12 Ethyl Corporation Infusion package
AU575226B2 (en) * 1984-11-20 1988-07-21 Hugh Patrick Christie Tea bag with a protective cover
US4875574A (en) * 1989-02-24 1989-10-24 Travers Barbara E Infusion package
US4880110A (en) * 1988-06-10 1989-11-14 Walker Richard S Grasping means associated with retrieval means for infusion packages
US4948601A (en) * 1989-10-10 1990-08-14 Serbu Gideon P Device for brewing coffee
US4981588A (en) * 1987-05-09 1991-01-01 Jacobs Suchard Gmbh Filter for making coffee drinks that includes supporting members
WO1992015500A1 (en) * 1991-02-27 1992-09-17 Hugh Patrick Christie Infusible pouch and cover
US5318786A (en) * 1992-09-03 1994-06-07 Melvin Clarkson Suspended beverage infusion bag
US5424083A (en) * 1994-10-24 1995-06-13 Lozito; Michael C. Self contained disposable coffee brewing device
US5478581A (en) * 1991-02-27 1995-12-26 Christie; Hugh P. Infusible pouch and cover
US5913964A (en) * 1996-12-16 1999-06-22 Espire Incorporated Infuser unit for making beverages
US5952028A (en) * 1997-03-07 1999-09-14 Lesser; Brian J. Disposable beverage insufer and method of making a beverage using the infuser
US6007853A (en) * 1997-03-07 1999-12-28 Dbf, Inc. Disposable beverage infuser
US6314866B1 (en) 1996-12-16 2001-11-13 Espire Incorporated Lid for beverage container with removable inner cover having an attached infuser unit
US6374726B1 (en) 1996-12-16 2002-04-23 Espire Incorporated Lid for beverage container with removable inner cover
US20030185942A1 (en) * 2002-03-18 2003-10-02 Tea Projects Limited Infusion package
US6733804B1 (en) * 1998-09-17 2004-05-11 Teepack Spezialmaschinen Gmbh & Co. Kg Multi-chambered infusion bag, especially for tea
US20090162491A1 (en) * 2007-12-21 2009-06-25 Torsten Burchard Brewing sachet
US20160376094A1 (en) * 2015-06-24 2016-12-29 Megan Louise Smyth Tea bag tag adhesive
WO2019091767A1 (en) 2017-11-09 2019-05-16 Unilever N.V. Tag for a teabag
US11643270B2 (en) * 2020-03-11 2023-05-09 Ohki Co., Ltd. Extraction bag

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US4141997A (en) * 1976-09-27 1979-02-27 Syroka Edward C Multi-compartment coffee steeping bag and support clip therefor
JPS5964765U (ja) * 1982-10-20 1984-04-28 凸版印刷株式会社 コ−ヒ−紅茶抽出バツグ付吊り具
DE3411152A1 (de) * 1984-03-27 1985-10-03 Horst Dipl.-Ing. 4005 Meerbusch Knäbel Flache huelle und verfahren zu ihrer herstellung
DE3544263A1 (de) * 1985-12-14 1987-06-19 Jacobs Joh & Co Aufgussbeutel zur herstellung von insbesondere kaffeegetraenken
US4880651A (en) * 1986-05-15 1989-11-14 Christie Hugh P Method of and apparatus for producing infusible bag holders
GB2229991B (en) * 1988-12-22 1993-01-27 Tea Council Limited Improvements relating to infusion packages
US5091197A (en) * 1990-06-08 1992-02-25 Rosemary Ferro Tea bag with squeezing device
JPH04339778A (ja) * 1991-05-07 1992-11-26 Ishigaki Shokuhin Kk コーヒー等の浸出バッグ
DK172116B1 (da) * 1994-02-23 1997-11-17 Unigreen Int As Éngangsfilterpose til brug ved fremstilling af ekstraktionsdrikke, navnlig te
US5861185A (en) * 1996-08-22 1999-01-19 Mars, Incorporated Ultrasonic forming of confectionery products
US5871783A (en) * 1996-08-22 1999-02-16 Mars, Incorporated Apparatus for ultrasonically forming confectionery products
US5871793A (en) 1996-11-27 1999-02-16 Mars Incorporated Puffed cereal cakes
GB2335910B (en) 1998-04-01 2002-07-03 Masterfoods S A Nv Boil-in-bag sachet
US20020127310A1 (en) * 1998-12-07 2002-09-12 Capodieci Roberto A. Cereal food product and method
US6368647B1 (en) * 1998-12-29 2002-04-09 Mars, Incorporated Ultrasonically activated continuous slitter apparatus and method
US6395317B1 (en) 1999-02-11 2002-05-28 Mars Incorporated Process and apparatus for forming dual compartment pouches from a continuous web
US6153232A (en) * 1999-02-11 2000-11-28 Uncle Ben's, Inc. Boil-in-bag package
US6274180B1 (en) * 1999-05-17 2001-08-14 Jsd Partners Expandable beverage infusion device
GB0000921D0 (en) * 2000-01-14 2000-03-08 Molins Plc Infusion packages
US7081078B2 (en) * 2000-01-14 2006-07-25 Molins Plc Infusion packages and corresponding manufacturing methods
AUPR304401A0 (en) * 2001-02-12 2001-03-08 Brandname Properties Pty Ltd Package for infusible substance
AU2002231452B2 (en) * 2001-02-12 2004-12-23 Tstix Pty Ltd Package of an infusible substance
US6574944B2 (en) 2001-06-19 2003-06-10 Mars Incorporated Method and system for ultrasonic sealing of food product packaging
US6655948B2 (en) 2001-08-31 2003-12-02 Mars, Incorporated System of ultrasonic processing of pre-baked food product
US6635292B2 (en) * 2001-10-26 2003-10-21 Mars, Incorporated Ultrasonic rotary forming of food products
GB2389832B (en) * 2002-06-21 2006-02-15 Hazel Flores Upright pouch with flip compartment
US20050092185A1 (en) * 2003-10-31 2005-05-05 Magna Terra B.V. Device for providing a drink from extracts, in particular tea extracts, and cover and container for use in such a device
JP4688142B2 (ja) * 2005-03-29 2011-05-25 山中産業株式会社 コーヒー及びその他嗜好性飲料抽出用バッグ
US20080017043A1 (en) * 2006-06-01 2008-01-24 The Coca-Cola Company Tea Stick Brewing Package and Method
US20100083840A1 (en) * 2007-06-08 2010-04-08 Robert Small Infusible substance dispenser
TWM369718U (en) * 2009-07-17 2009-12-01 Pegatron Corp Disposable tea set and tea pot thereof
GB0920992D0 (en) * 2009-12-01 2010-01-13 Betula Bvba Bold Brush
US8672907B2 (en) * 2010-07-26 2014-03-18 Hollister Incorporated Drainable ostomy pouch
KR101254937B1 (ko) * 2011-12-05 2013-04-23 주식회사 티레모 스틱형 티백의 제조방법
JP6710385B1 (ja) * 2019-09-03 2020-06-17 キーコーヒー株式会社 抽出バッグ
WO2021192106A1 (ja) * 2020-03-25 2021-09-30 大紀商事株式会社 抽出バッグ
TWI821548B (zh) * 2020-03-25 2023-11-11 日商大紀商事股份有限公司 萃取袋

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US2192605A (en) * 1939-03-30 1940-03-05 Iers Lee Company Infusion package
US2291278A (en) * 1939-05-13 1942-07-28 Pneumatic Scale Corp Tea or coffee bag
US2413686A (en) * 1941-02-26 1947-01-07 Millie Patent Holding Co Inc Infusion package with handle and the method of manufacturing same
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US2879613A (en) * 1957-04-24 1959-03-31 Mario Joseph De Tea bag tags
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Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4110955A (en) * 1975-07-02 1978-09-05 Adolf Rambold Infusion bag and method of packaging infusion bag
US4465697A (en) * 1983-06-14 1984-08-14 Brice Ilotan Research Corporation Coffee brewing apparatus and method
US4605123A (en) * 1983-12-15 1986-08-12 Ethyl Corporation Infusion package
US4602557A (en) * 1984-07-13 1986-07-29 John Yip Liquid brewing cup
WO1986003176A1 (en) * 1984-11-20 1986-06-05 Hugh Patrick Christie Tea bag with a protective cover
US4726956A (en) * 1984-11-20 1988-02-23 Christie Hugh P Tea bag with a protective cover
AU575226B2 (en) * 1984-11-20 1988-07-21 Hugh Patrick Christie Tea bag with a protective cover
US4981588A (en) * 1987-05-09 1991-01-01 Jacobs Suchard Gmbh Filter for making coffee drinks that includes supporting members
US4880110A (en) * 1988-06-10 1989-11-14 Walker Richard S Grasping means associated with retrieval means for infusion packages
US4875574A (en) * 1989-02-24 1989-10-24 Travers Barbara E Infusion package
US4948601A (en) * 1989-10-10 1990-08-14 Serbu Gideon P Device for brewing coffee
WO1992015500A1 (en) * 1991-02-27 1992-09-17 Hugh Patrick Christie Infusible pouch and cover
US5478581A (en) * 1991-02-27 1995-12-26 Christie; Hugh P. Infusible pouch and cover
US5318786A (en) * 1992-09-03 1994-06-07 Melvin Clarkson Suspended beverage infusion bag
US5424083A (en) * 1994-10-24 1995-06-13 Lozito; Michael C. Self contained disposable coffee brewing device
US6314866B1 (en) 1996-12-16 2001-11-13 Espire Incorporated Lid for beverage container with removable inner cover having an attached infuser unit
US5913964A (en) * 1996-12-16 1999-06-22 Espire Incorporated Infuser unit for making beverages
US6374726B1 (en) 1996-12-16 2002-04-23 Espire Incorporated Lid for beverage container with removable inner cover
US6095033A (en) * 1996-12-16 2000-08-01 Espire, Inc. Lid for beverage container
US6269736B1 (en) 1996-12-16 2001-08-07 Espire Incorporated Infuser filter for making beverages
US5952028A (en) * 1997-03-07 1999-09-14 Lesser; Brian J. Disposable beverage insufer and method of making a beverage using the infuser
US6007853A (en) * 1997-03-07 1999-12-28 Dbf, Inc. Disposable beverage infuser
US6733804B1 (en) * 1998-09-17 2004-05-11 Teepack Spezialmaschinen Gmbh & Co. Kg Multi-chambered infusion bag, especially for tea
US20030185942A1 (en) * 2002-03-18 2003-10-02 Tea Projects Limited Infusion package
US6851550B2 (en) * 2002-03-18 2005-02-08 Tea Projects Limited Infusion package
US20090162491A1 (en) * 2007-12-21 2009-06-25 Torsten Burchard Brewing sachet
US20160376094A1 (en) * 2015-06-24 2016-12-29 Megan Louise Smyth Tea bag tag adhesive
WO2019091767A1 (en) 2017-11-09 2019-05-16 Unilever N.V. Tag for a teabag
CN111315669A (zh) * 2017-11-09 2020-06-19 荷兰联合利华有限公司 茶袋用标签
EA038218B1 (ru) * 2017-11-09 2021-07-26 ЮНИЛЕВЕР АйПи ХОЛДИНГС Б.В. Ярлычок чайного пакетика
AU2018363086B2 (en) * 2017-11-09 2021-09-16 Ekaterra Research and Development UK Limited Tag for a teabag
US11643270B2 (en) * 2020-03-11 2023-05-09 Ohki Co., Ltd. Extraction bag

Also Published As

Publication number Publication date
IT997280B (it) 1975-12-30
CH566909A5 (it) 1975-09-30
NL7310111A (it) 1974-01-29
JPS5228070B2 (it) 1977-07-23
JPS4952062A (it) 1974-05-21
NL7310109A (it) 1974-01-29
JPS4952061A (it) 1974-05-21
AT331711B (de) 1976-08-25
ATA647373A (de) 1975-11-15
CH566910A5 (it) 1975-09-30
FR2194186A5 (it) 1974-02-22
CH565687A5 (it) 1975-08-29
GB1388366A (en) 1975-03-26
NL7310110A (it) 1974-01-29
GB1381849A (en) 1975-01-29
JPS4944865A (it) 1974-04-27
US3895118A (en) 1975-07-15

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