US3650271A - Nipple for baby bottle - Google Patents

Nipple for baby bottle Download PDF

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Publication number
US3650271A
US3650271A US43697A US3650271DA US3650271A US 3650271 A US3650271 A US 3650271A US 43697 A US43697 A US 43697A US 3650271D A US3650271D A US 3650271DA US 3650271 A US3650271 A US 3650271A
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nipple
slot
bottle
baby bottle
flow
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US43697A
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Pierre Pelli
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LOreal SA
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LOreal SA
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J11/00—Teats
    • A61J11/001—Teats having means for regulating the flow rate
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J11/00—Teats
    • A61J11/001—Teats having means for regulating the flow rate
    • A61J11/0015—Teats having means for regulating the flow rate by size or shape of the opening

Definitions

  • ABSTRACT Nipple for baby bottle has at least one slot in the portion sucked by the baby. At least one end of at least one slot terminates in a hole having a diameter greater than the width of the slot.
  • nipple which has a variable and adjustable rate of flow and is adapted to be mounted on a baby bottle to feed infants.
  • This nipple is essentially characterized by the fact that its orifice for passing the milk or formula is in the form of a slot.
  • the nipple, or an intermediate part, or even the bottle itself, is provided with markings having a predetermined angular position with respect to the slot so as to make it possible to adjust the position of the "slot with respect to the median plane of the head of the child by rotating the bottle about its axis.
  • This adjustment modifies the rate of flow through the nipple because it results in opening the slot more or less widely each time the lips of the infant exert suction thereon.
  • lt has also been proposed to provide a single nipple with one or more slots such as that described above, which may or may not be straight and may or may not be parallel.
  • the error which results may be as much as 0.5 mm. and the flow delivered by the nipple is substantially affected thereby.
  • the slotted nipples have two important disadvantages when being used.
  • the flow delivered through the nipple for a given position of the slot with respect to the median plane of the head of the child is not constant over a period of time.
  • the nipple has been used several times the movements of the lips of the slot when sucked on by the child progressively tear the two ends of the slot so that the length of the slot increases during use and the flow delivered to the child for a given position of the nipple is not the same when one uses a new nipple as when one uses an old nipple.
  • the slotted nipples In the second place the slotted nipples have the disadvantage of preventing air from entering into the bottle during sucking movements of the child after a certain quantity of liquid has been evacuated from the bottle.
  • the action ofthe child on the nipple relaxes and the lips of the slot close against each other so that for practical purposes air cannot enter the bottle through the slot. This creates a sub-atmospheric pressure inside the bottle, renders subsequent sucking motion difficult, and finally deforms the nipple to the point at which it is necessary to admit air into the bottle around the base by which this nipple is attached to the bottle.
  • the present invention is accordingly directed to a new article of manufacture which consists ofa nipple having a variable and adjustable flow adapted to be attached to a baby bottle.
  • This nipple has at the end adapted to be suckled by the infant at least one slot which may or may not be straight.
  • the nipple is provided with markings oriented with respect to the slot and is essentially characterized by the fact that at least one of the ends of a slot in the nipple opens into a hole pierced through the wall ofthe nipple.
  • holes are formed at the two ends of the slot, which holes have a substantially circular section. Good results have been obtained with a slot 2.5 mm. long using end holes having a diameter of about 0.15 mm. In general, the slot may have a length between 1.5 and 5 mm. and the end holes a diameter between 0.05 and 0.3
  • orientation marks which are associated with the slot or slots carried by the end of the nipple may be on the nipple itself, for example on its base, or on an intermediate member, or even on the bottle to which the nipple is attached.
  • each slot provided at its two ends with holes, as indicated in the foregoing definition, retains a constant length in the course of use, because the end of the slot is perfectly terminated in the material of the nipple by the existence of the hole itself. There is therefore no tendency for the length of the slot to increase during use.
  • the lips of the slot close, but if a subatmospheric pressure exists inside the nipple, air can enter into the bottle by passing through the holes at the end of each slot. It follows that the nipple is not deformed in the course of use.
  • FIG. 1 is an elevational view, partly in section, through a nipple according to the invention with the section taken through the axis of the nipple;
  • FIG. 2 is a plan view of the top of the nipple of FIG. 1.
  • reference numeral 1 indicates the nipple as a whole.
  • This nipple comprises an end 2 which is sucked by the infant.
  • At the top of the end 2 are two holes 3a, 3b, each having a diameter of 0.15 mm. The centers of these holes are 2.42 mm. apart.
  • the axis of the two holes 30 3b lie in the same axial plane passing through the nipple 1.
  • a slot 4 is then cut between the holes 3a and 3b which connects these two holes and consequently also lies in an axial plane through the nipple 1.
  • indicia 5a, 5b and 50 lie in an axial plane perpendicular to the slot 4.
  • 5b lies in an axial plane at an angle of 45 to the plane which contains the indicia 5a.
  • the indicia 5c lies in the axial plane which contains the slot 4.
  • the sucking movement will not open the lips of the slot 4 very wide, that is to say a minimum flow through the nipple occurs.
  • the indicia 5c is positioned under the nose of the child by rotating the bottle about its axis, a maximum flow results because of the separation of the two lips of the slot 4. If the indicia 5b is used the rate of flow is intermediate between those obtained in the two previously described positions.
  • the length of the slot 4 will not be increased by use since thetwo ends of this slot are terminated by the two end holes 3a, 3b. Moreover, when the sucking'movement of the child stops, the low pressure which has been created inside the bottle may be overcome by an inflow of air which passes through the holes 3a and 3b, even if the lips of the slot 4 are perfectly sealed.
  • the nipple according to the invention may have several slots, each provided with a hole at each end, which slots may or may not be straight, and may or may not be parallel. Moreover a slot may have a hole at only one end. Finally, when the nipple has several slots, some of the slots may have end holes whereas the others do not.
  • Nipple having a variable and adjustable rate of flow and adapted to be attached to a baby bottle, which nipple comprises at least one slot in the end adapted to be inserted in the mouth of a child, with both ends of each slot terminating in a substantially circular hole having a diameter greater than that of said slot extending through the wall of the nipple.
  • Nipple as claimed in claim 1 essentially characterized by the fact that the slot is between 1.5 and 5 mm long and the end holes have a diameter of between 0.05 mm and 0.3 mm.
  • Nipple having a variable and adjustable rate of flow, said nipple being made of flexible sheet material formed into a dome-shaped body having a peripheral rim dimensioned to engage the mouth of a baby bottle and a hollow central protuberance projecting from said body, said protuberance being shaped and dimensioned to be received in the mouth of a baby and having at least one slot extending through said sheet material and the center of said protuberance, at least one end of at least one slot terminating in a hole having a diameter 5 greater than that of said slot.

Abstract

Nipple for baby bottle has at least one slot in the portion sucked by the baby. At least one end of at least one slot terminates in a hole having a diameter greater than the width of the slot.

Description

United States Patent Pelli 51 Mar. 21, 1972 [54] NIPPLE FOR BABY BOTTLE [72] Inventor: Pierre Pelli, Paris, France [73] Assignee: LOreal [22] Filed: June 5, 1970 211 Appi.No.: 43,697
[30] Foreign Application Priority Date July 29, 1969 France ..6925828 [52] U.S.Cl. ..l28/252,2l5/ll R 51 lnt.C1. [58] FieldofSearch ..128/252;215/11 [56] References Cited UNITED STATES PATENTS 1,165,275 12/1915 Montgomery ..l28/252 FOREIGN PATENTS QR APPLICATIONS 112,044 3/1917 Great Britain 128/252 566,078 7/1958 Belgium ..128/252 Primary Examiner-Richard A. Gaudet Assistant ExaminerJ. Yasko Attorney-Holcombe, Wetherill & Brisebois [57] ABSTRACT Nipple for baby bottle has at least one slot in the portion sucked by the baby. At least one end of at least one slot terminates in a hole having a diameter greater than the width of the slot.
4 Claims, 2 Drawing Figures NIPPLE FOR BABY BOTTLE SUMMARY OF THE INVENTION There is a conventional type of nipple which has a variable and adjustable rate of flow and is adapted to be mounted on a baby bottle to feed infants. This nipple is essentially characterized by the fact that its orifice for passing the milk or formula is in the form of a slot. The nipple, or an intermediate part, or even the bottle itself, is provided with markings having a predetermined angular position with respect to the slot so as to make it possible to adjust the position of the "slot with respect to the median plane of the head of the child by rotating the bottle about its axis. This adjustment modifies the rate of flow through the nipple because it results in opening the slot more or less widely each time the lips of the infant exert suction thereon. lt has also been proposed to provide a single nipple with one or more slots such as that described above, which may or may not be straight and may or may not be parallel.
An important difficulty exits in manufacturing such nipples. In effect the flow of fluid and in particular, milk, which may be obtained with a slotted nipple is a function of the length of the slot. However, because of the soft and elastic nature of the rubber or synthetic elastomers from which the nipple is made, it is impossible. during the course of manufacture, when the knife descends on the top of the nipple, to assure a constant rigorously accurate length for the slot.
The error which results may be as much as 0.5 mm. and the flow delivered by the nipple is substantially affected thereby.
Moreover, the slotted nipples have two important disadvantages when being used. In the first place the flow delivered through the nipple for a given position of the slot with respect to the median plane of the head of the child is not constant over a period of time. When the nipple has been used several times the movements of the lips of the slot when sucked on by the child progressively tear the two ends of the slot so that the length of the slot increases during use and the flow delivered to the child for a given position of the nipple is not the same when one uses a new nipple as when one uses an old nipple. In the second place the slotted nipples have the disadvantage of preventing air from entering into the bottle during sucking movements of the child after a certain quantity of liquid has been evacuated from the bottle. The action ofthe child on the nipple relaxes and the lips of the slot close against each other so that for practical purposes air cannot enter the bottle through the slot. This creates a sub-atmospheric pressure inside the bottle, renders subsequent sucking motion difficult, and finally deforms the nipple to the point at which it is necessary to admit air into the bottle around the base by which this nipple is attached to the bottle.
it is the object of the present invention to palliate these disadvantages by means of a simple arrangement which simultaneously overcomes both these disadvantages.
The present invention is accordingly directed to a new article of manufacture which consists ofa nipple having a variable and adjustable flow adapted to be attached to a baby bottle. This nipple has at the end adapted to be suckled by the infant at least one slot which may or may not be straight. The nipple is provided with markings oriented with respect to the slot and is essentially characterized by the fact that at least one of the ends of a slot in the nipple opens into a hole pierced through the wall ofthe nipple.
In a preferred embodiment of the invention holes are formed at the two ends of the slot, which holes have a substantially circular section. Good results have been obtained with a slot 2.5 mm. long using end holes having a diameter of about 0.15 mm. In general, the slot may have a length between 1.5 and 5 mm. and the end holes a diameter between 0.05 and 0.3
lt is obvious that the orientation marks which are associated with the slot or slots carried by the end of the nipple may be on the nipple itself, for example on its base, or on an intermediate member, or even on the bottle to which the nipple is attached.
It will be appreciated that each slot, provided at its two ends with holes, as indicated in the foregoing definition, retains a constant length in the course of use, because the end of the slot is perfectly terminated in the material of the nipple by the existence of the hole itself. There is therefore no tendency for the length of the slot to increase during use. Moreover, when the infant is not sucking, the lips of the slot close, but if a subatmospheric pressure exists inside the nipple, air can enter into the bottle by passing through the holes at the end of each slot. It follows that the nipple is not deformed in the course of use.
In order that the object of the invention may be better understood a preferred embodiment thereof will now be described, purely by way of illustration and example, with reference to the accompanying drawings on which:
FIG. 1 is an elevational view, partly in section, through a nipple according to the invention with the section taken through the axis of the nipple;
FIG. 2 is a plan view of the top of the nipple of FIG. 1.
Referring to the drawings, it will be seen that reference numeral 1 indicates the nipple as a whole. This nipple comprises an end 2 which is sucked by the infant. At the top of the end 2 are two holes 3a, 3b, each having a diameter of 0.15 mm. The centers of these holes are 2.42 mm. apart. The axis of the two holes 30 3b lie in the same axial plane passing through the nipple 1. A slot 4 is then cut between the holes 3a and 3b which connects these two holes and consequently also lies in an axial plane through the nipple 1.
Along the lower edge of the nipple l are three indicia 5a, 5b and 50. 5a lies in an axial plane perpendicular to the slot 4. 5b lies in an axial plane at an angle of 45 to the plane which contains the indicia 5a. The indicia 5c lies in the axial plane which contains the slot 4.
As is well known, when the indicia 5a is positioned under the nose of the child which is using the nipple, the sucking movement will not open the lips of the slot 4 very wide, that is to say a minimum flow through the nipple occurs. When, on the contrary, the indicia 5c is positioned under the nose of the child by rotating the bottle about its axis, a maximum flow results because of the separation of the two lips of the slot 4. If the indicia 5b is used the rate of flow is intermediate between those obtained in the two previously described positions.
It is obvious that the length of the slot 4 will not be increased by use since thetwo ends of this slot are terminated by the two end holes 3a, 3b. Moreover, when the sucking'movement of the child stops, the low pressure which has been created inside the bottle may be overcome by an inflow of air which passes through the holes 3a and 3b, even if the lips of the slot 4 are perfectly sealed.
It will of course be appreciated that the foregoing embodiment has been described purely by way of illustration and example and may be modified as to detail without thereby departing from the basic principles of the invention. In particular, the nipple according to the invention may have several slots, each provided with a hole at each end, which slots may or may not be straight, and may or may not be parallel. Moreover a slot may have a hole at only one end. Finally, when the nipple has several slots, some of the slots may have end holes whereas the others do not.
What is claimed is:
1. Nipple having a variable and adjustable rate of flow and adapted to be attached to a baby bottle, which nipple comprises at least one slot in the end adapted to be inserted in the mouth of a child, with both ends of each slot terminating in a substantially circular hole having a diameter greater than that of said slot extending through the wall of the nipple.
2. Nipple as claimed in claim 1 essentially characterized by the fact that the slot is between 1.5 and 5 mm long and the end holes have a diameter of between 0.05 mm and 0.3 mm.
3. Nipple having a variable and adjustable rate of flow, said nipple being made of flexible sheet material formed into a dome-shaped body having a peripheral rim dimensioned to engage the mouth of a baby bottle and a hollow central protuberance projecting from said body, said protuberance being shaped and dimensioned to be received in the mouth of a baby and having at least one slot extending through said sheet material and the center of said protuberance, at least one end of at least one slot terminating in a hole having a diameter 5 greater than that of said slot.
4. Nipple as claimed in claim 3, which is provided with indicia at different angular orientations with respect to said slot.

Claims (4)

1. Nipple having a variable and adjustable rate of flow and adapted to be attached to a baby bottle, which nipple comprises at least one slot in the end adapted to be inserted in the mouth of a child, with both ends of each slot terminating in a substantially circular hole having a diameter greater than that of said slot extending through the wall of the nipple.
2. Nipple as claimed in claim 1 essentially characterized by the fact that the slot is between 1.5 and 5 mm long and the end holes have a diameter of between 0.05 mm and 0.3 mm.
3. Nipple having a variable and adjustable rate of flow, said nipple being made of flexible sheet material formed into a dome-shaped body having a peripheral rim dimensioned to engage the mouth of a baby bottle and a hollow central protuberance projecting from said body, said protuberance being shaped and dimensioned to be received in the mouth of a baby and having at least one slot extending through said sheet material and the center of said protuberance, at least one end of at least one slot terminating in a hole having a diameter greater than that of said slot.
4. Nipple as claimed in claim 3, which is provided with indicia at different angular orientations with respect to said slot.
US43697A 1969-07-29 1970-06-05 Nipple for baby bottle Expired - Lifetime US3650271A (en)

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FR6925828A FR2052206A5 (en) 1969-07-29 1969-07-29

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BE (1) BE749655A (en)
CA (1) CA937546A (en)
CH (1) CH512914A (en)
DE (1) DE2031319A1 (en)
FR (1) FR2052206A5 (en)
GB (1) GB1260107A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924620A (en) * 1973-11-05 1975-12-09 Alpha Bebe Sante Zone Ind Feeding device with regulable flow
US5117994A (en) * 1989-02-08 1992-06-02 Laboratoires Polive Variable-flow feeder
US5690679A (en) * 1991-12-30 1997-11-25 Prentiss; John Gilbert Infant feeding container
EP0634922B1 (en) * 1992-04-07 1998-06-10 HABERMAN, Mandy Nicola Drinking vessel suitable for use as a trainer cup or the like
US6116457A (en) * 1995-09-01 2000-09-12 Haberman; Mandy Nicola Drinks containers
USD448242S1 (en) 1999-12-30 2001-09-25 Johnson & Johnson Consumer Companies, Inc. Trainer cup
USD448976S1 (en) 1999-12-30 2001-10-09 Johnson & Johnson Consumer Companies, Inc. Pinched trainer cup
USD450535S1 (en) 1999-12-30 2001-11-20 Mcdonough Justin E. Trainer cup
US6422415B1 (en) 1998-02-06 2002-07-23 Playtex Products, Inc. Leak-proof cup assembly with flow control element
US20020104816A1 (en) * 2002-03-29 2002-08-08 Jon Feldman Single-piece nipple to fit various beverage containers
US6588613B1 (en) * 2002-05-13 2003-07-08 The United States Of America As Represented By The Secretary Of The Air Force Baby-feeding nipple
US20040035815A1 (en) * 2000-09-12 2004-02-26 Webb Ian Alexander Drinking vessel
US20050072788A1 (en) * 1998-02-06 2005-04-07 Playtex Products, Inc. Flow control element for use with leak-proof cup assemblies
US7147121B2 (en) 2003-04-03 2006-12-12 Abc Development Inc. Valve for non-spill cup
US20070221604A1 (en) * 2002-08-05 2007-09-27 Hakim Nouri E No-Spill Drinking Products
US20100314347A1 (en) * 2007-12-21 2010-12-16 The Anywayup Company Limited Feeding apparatus

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2417978A1 (en) * 1978-02-27 1979-09-21 Oreal IMPROVEMENTS MADE TO A BOTTLE BOTTLE
FR2608920B1 (en) * 1986-12-30 1995-06-16 Oreal VARIABLE AND ADJUSTABLE FLOW TETINE FOR ADAPTING TO A BOTTLE FOR FEEDING INFANTS
FR2627694B1 (en) * 1988-02-25 1995-06-16 Oreal VARIABLE AND ADJUSTABLE FLOW TETINE, ADAPTED TO A BOTTLE FOR THE FEEDING OF INFANTS
FR2658074B1 (en) * 1990-02-12 1992-05-15 Dufort Maurice BOTTLE TEETH WITH ADJUSTABLE WATERPROOF FLOW WHEN THE BOTTLE IS IN THE RETURNED POSITION.
FR2794363B1 (en) * 1999-06-02 2001-08-10 Pierre Grasset METHOD AND INSTALLATION FOR MAKING MARKS ON A SILICONE FOOD ARTICLE AND A SILICONE FOOD ARTICLE THUS OBTAINED
BE1021890B1 (en) * 2014-06-17 2016-01-25 Materni Bvba SPEAKING WITH CONFIRMATION RING

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE566078A (en) * 1957-03-26
US1165275A (en) * 1915-04-26 1915-12-21 Miriam Montgomery Anticolic-nurser.
GB112044A (en) * 1916-12-21 1917-12-21 Frederick Richard Graham-Yooll Improvements in and connected with the Teats or Mouth-pieces of Feeding Bottles.

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Publication number Priority date Publication date Assignee Title
DE202584C (en) * 1907-10-25
US2223179A (en) * 1937-08-14 1940-11-26 Lougheed Victor Nursing nipple
US2688326A (en) * 1952-03-28 1954-09-07 Martin D Lerman Nursing nipple
US3161311A (en) * 1963-01-30 1964-12-15 Dunhill International Inc Disposable nurser

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1165275A (en) * 1915-04-26 1915-12-21 Miriam Montgomery Anticolic-nurser.
GB112044A (en) * 1916-12-21 1917-12-21 Frederick Richard Graham-Yooll Improvements in and connected with the Teats or Mouth-pieces of Feeding Bottles.
BE566078A (en) * 1957-03-26

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924620A (en) * 1973-11-05 1975-12-09 Alpha Bebe Sante Zone Ind Feeding device with regulable flow
US5117994A (en) * 1989-02-08 1992-06-02 Laboratoires Polive Variable-flow feeder
US5690679A (en) * 1991-12-30 1997-11-25 Prentiss; John Gilbert Infant feeding container
EP0634922B1 (en) * 1992-04-07 1998-06-10 HABERMAN, Mandy Nicola Drinking vessel suitable for use as a trainer cup or the like
US6102245A (en) * 1992-04-07 2000-08-15 Haberman; Mandy Nicola Drinking vessel with valve
US6116457A (en) * 1995-09-01 2000-09-12 Haberman; Mandy Nicola Drinks containers
US20100270322A1 (en) * 1998-02-06 2010-10-28 Playtex Products, Inc. Flow control element for use with leak-proof cup assemblies
US20050072788A1 (en) * 1998-02-06 2005-04-07 Playtex Products, Inc. Flow control element for use with leak-proof cup assemblies
US6422415B1 (en) 1998-02-06 2002-07-23 Playtex Products, Inc. Leak-proof cup assembly with flow control element
USD452415S1 (en) 1999-12-30 2001-12-25 Mcdonough Justin E. Pinched trainer cup
USD448976S1 (en) 1999-12-30 2001-10-09 Johnson & Johnson Consumer Companies, Inc. Pinched trainer cup
USD450535S1 (en) 1999-12-30 2001-11-20 Mcdonough Justin E. Trainer cup
USD448242S1 (en) 1999-12-30 2001-09-25 Johnson & Johnson Consumer Companies, Inc. Trainer cup
USD463216S1 (en) 1999-12-30 2002-09-24 Johnson & Johnson Consumer Companies, Inc. Trainer cup
USD452116S1 (en) 1999-12-30 2001-12-18 Mcdonough Justin E. Trainer cup
US20040035815A1 (en) * 2000-09-12 2004-02-26 Webb Ian Alexander Drinking vessel
US7204380B2 (en) 2000-09-12 2007-04-17 Jackel International Limited Drinking vessel
US20020104816A1 (en) * 2002-03-29 2002-08-08 Jon Feldman Single-piece nipple to fit various beverage containers
US6588613B1 (en) * 2002-05-13 2003-07-08 The United States Of America As Represented By The Secretary Of The Air Force Baby-feeding nipple
US20070221604A1 (en) * 2002-08-05 2007-09-27 Hakim Nouri E No-Spill Drinking Products
US7147121B2 (en) 2003-04-03 2006-12-12 Abc Development Inc. Valve for non-spill cup
US20100314347A1 (en) * 2007-12-21 2010-12-16 The Anywayup Company Limited Feeding apparatus
US9161886B2 (en) * 2007-12-21 2015-10-20 Haberman Products Limited Feeding apparatus

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CH512914A (en) 1971-09-30
CA937546A (en) 1973-11-27
DE2031319A1 (en) 1971-02-11
GB1260107A (en) 1972-01-12
BE749655A (en) 1970-10-28
FR2052206A5 (en) 1971-04-09

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