US2697057A - Method of making a diaphragm - Google Patents

Method of making a diaphragm Download PDF

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Publication number
US2697057A
US2697057A US23841451A US2697057A US 2697057 A US2697057 A US 2697057A US 23841451 A US23841451 A US 23841451A US 2697057 A US2697057 A US 2697057A
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United States
Prior art keywords
rim
sheet
portion
diaphragm
dome
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Inventor
Frank A Senger
Richard B Sellars
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ortho Pharmaceutical Corp
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Ortho Pharmaceutical Corp
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Publication date
Priority to US6691248A priority Critical
Application filed by Ortho Pharmaceutical Corp filed Critical Ortho Pharmaceutical Corp
Priority to US23841451 priority patent/US2697057A/en
Application granted granted Critical
Publication of US2697057A publication Critical patent/US2697057A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00Subject matter not provided for in other groups of this subclass
    • B29D99/005Producing membranes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F6/00Contraceptive devices; Pessaries; Applicators therefor
    • A61F6/06Contraceptive devices; Pessaries; Applicators therefor for use by females
    • A61F6/08Pessaries, i.e. devices worn in the vagina to support the uterus, remedy a malposition or prevent conception, e.g. combined with devices protecting against contagion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/755Membranes, diaphragms
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/76Processes of uniting two or more parts
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1002Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1002Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1028Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina by bending, drawing or stretch forming sheet to assume shape of configured lamina while in contact therewith
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10Methods of surface bonding and/or assembly therefor
    • Y10T156/1052Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1054Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing and simultaneously bonding [e.g., cut-seaming]

Description

Dec. 14, 1954 F. A. SENGER ETAL METHOD OF MAKING A DIAPHRAGM Origirial Filed Dec. 25, 1948 BY y - A TTORA EY:

, oval conformation. necessary, in order that the pessary'function properly in 'pressing against the vaginal walls,'to have a--res1l1ent metallic member or members embedded in the circular This invention relates to occlusive vaginal diaphragms 'or' pessaries and particularly to a-diaph'ragm' or pessary having a rim portion without a metallic assembly therein functioning as'resilient'means and totheme'thod and apparatus for making them.

Heretofore it has been the practice ro-manufacture occlusive diaphragms or pessaries of high grade natural rubber such as pale crepe.- Such pessaries have been "composed of a dome-shaped thin rubber element which is sealed or vulcanized to a continuous rim 'in'circu'lar or In such an assembly, 6 it has been edge or rim. The resilient member most commonly used has been a single coiled spring although ln-some instances 'two coiled springs have been used. I The manufacture of such pessaries having resilien'tmembers embedded in-the rim or edge has been expensive, and, consequently, such pessaries are not customarily disposed of after a single use butareused "repeatedly over-'extended -periods of time. A number of diificulties'have 'been encountered in the manufacture of such pessaries by a molding process, for'it is necessary to overcome the undesirable anddisad- 'vantageous feature which commonly'prevails which consists of the resilient member not being completely coated with rubber. 'This has been -overcome by'rnanually applying latex-to--that-portion-of *the rim at whichthe metallic resilient member is exposed. The latex dip process has been used-to-manufacture pessaries, but it is 7 time consumingandexpensiveand requires such careful control of its numerous-steps that it results in many "defective pessaries.

Among the objects of the present invention is the provision of a new and improved pessary which is fabricated of a material other than rubber and preferably of a synthetic thermoplastic substance.

Another object of the invention is the provision of a new and improved method for manufacturing a pessary from a synthetic thermoplastic substance.

Still another object of the invention is the provision of a new and improved pessary of a synthetic thermoplastic substance in which the resilient means, by which the pessary closely conforms to and contacts the vaginal walls, is a synthetic thermoplastic substance.

Another and further object of the invention is the provision of a pessary which is sufficiently low in cost of construction and materials to be economically disposed of after a single use.

Another object of this invention is the provision of a new and improved molded article having a dome-like shape and a resilient rim or edge without the inclusion of metal resilient means.

With these and other objects in view, the invention as hereinafter more fully set forth and pointed out in the claims may be illustrated in the accompanying drawing in which:

Fig. 1 is a perspective view of the pessary;

Fig. 2 is a view in elevation of the pessary;

Fig. 3 is a vertical cross-sectional view of the pessary;

Fig. 4 is an enlarged fragmentary view in cross-section showing the diaphragm ring in one modification;

Fig. 5 is an enlarged fragmentary view in cross-section showing a modification of the diaphragm;

Fig. 6 is a cross-sectional view of the elements of a mold, shown spaced apart, used in manufacturing diaphragms;

United States PatenfO 2,697,057 Patented Dec. 14, 1954 *Fig; 7 is a view simi1ar tothat of Fig; 6 but showing --F-ig." 8 is" a view-similar to'F-igsl 6 and 7 but showing 'the mold elementsin closed position and filled with a thermoplastic "composition; and

Fig? 9-iis an-enlarged fragmentary view ofFig. 8 show- "ing the relation of the membrane tothe rim of the diaphragm'and the manner in which-it -is sealedto the rim "Whenthe mold is closed.

Referringparticularly-now to Figs. 1 and 2, there is *shown a pessary 10 -including=a membrane '11 of a syn- -"-thetic,--nontoxic, flexible, impermeable, thermoplastic "substarice' and' a-rnar ginal rim portion #12. "The rim portion-12 maybeof any desired shape such as that of a circle or an ellipse.

The rimtportion 12 maybe composed of the same material as that of which membrane 1'1 is'co'mp'o'sed or rimtportion 12 maybe composedof a different synthetic, thermoplastic, non-toxic, flexible, im- 'permeable'substance; butvinlall instances it is necessary that-membrane 11 he capable of being heat sealed to -ma'rginal rim portion 12. As specifically'illustrated in Fig.-5',-'therim portion in the preferred embodiment is in the nature of acontinuous hollow tube, but it is'contemplated that it'may be in the form ofasolid continuous rod, as illustrated in Fig. 4. The rim portion 12 may be made'from an extruded tube or rod, which has been cut into suitable lengthsyby juxtaposingthe ends thereof and "locally applying'heat sufiicient to fuse the ends together.

Dome-shaped membrane 11'is separately formed and then heat sealed at its edges toithe marginal rim portion 12. The dome-shaped membrane Ibisapreferably of a thickness of from one to four thousandths-of an inch.

Any synthet ic thermoplastic-substance may .be used WhICh IS non-rigid, non-toxic, non-irritating, and capable The preferred synbe used which has an average molecular weight of from 15,000 -to 22,000. -Other non-rigid thermoplasticsubstances, solid at room temperature, which may be used in fabricating the pessary or diaphragm include: plasticized poylvinyl chloride such as that which is plasticized with tricresyl phosphate or dibutyl phthalate; copolymers of vinyl chloride with vinylidene chloride, vinyl acetate, or ethyl maleate; and a blend of polyvinyl chloride with a copolymer of butadiene and acrylonitrile.

The process or method by which the pessary is manufactured and suitable equipment used in the manufacture thereof are illustrated in Figs. 6, 7, and 8 which show a mold having bottom and top members which when in a closed position have a clearance not greater than five thousandths of an inch. Bottom member 20 of the mold, as shown in these figures, has a central recessed or open portion 21 and an annular groove or recess 22. Top member 24 of the mold has a central dome portion 25 and an annular heating element 26 having an annular groove or recess 27 encircled by a searing element 28. A spring biased ring 29 (the spring is not shown) which acts as a pressure clamp is positioned in an annular recess in top member 24 of the mold.

In the manufacture of a pessary according to the preferred method of this invention, the first step is the formation of the rim portions and this is done by sealing together the two ends of a piece of thermoplastic synthetic material in the form of tubing of proper length by placing the side ends in touching relation when they are at a heat sealing temperature, which is near 112 C. when polythene is used, for polythene having an average molecular weight within the range of from 15,000 to 38,000 has a melting point of approximately 112 C. The formed rim 12 is then placed in the annular groove 22 of the bottom portion of the mold. The formed rim should be of such a size as to fit snugly into the annular groove. A sheet of synthetic thermoplastic substance 11 having a thickness of from one to four thousandths of an inch is then placed over the recessed portion of the bottom member of the mold, which bottom member is maintained at the temperature at which the thermoplastic substance being used is softened but below its melting temperature. The top member of the mold isalso maintained at a temperature at which the thermoplastic substance is softened but just below its melting temperature, and to shape the dome portion of the pessary the top member is slowly lowered whereby the dome-shaped portion of the top member of the mold comes in contact with the synthetic thermoplastic sheeting 11; and because of the temperature at which it is maintained, it causes the sheeting to conform to its dome-like shape. Before the dome portion of the top member of the mold comes in contact with the sheeting, the spring biased ring, which is at a comparatively lower temperature than the top or bottom mold elements, comes in contact with the sheeting and firmly holds it in place. At approximately the same time at which the annular groove around the dome portion of the top member of the mold comes in contact with the rim portion of the pessary, the searing element, which is maintained at the melting temperature of the thermoplastic substance, comes in contact with the sheeting and cuts the said sheeting in a circular form by melting it at the point with which it comes in contact with the searing element. The surface of the annular groove 27 around the dome portion of the top member of the mold is maintained at a temperature near the melting point of the thermoplastic substance and acts as a heat sealing element to seal the sheeting to the preformed diaphragm ring. The sheeting is sealed to the inner surface of the diaphragm ring, as illustrated in Figs. 3, 4, and 5.

In the closed position there is a clearance between the top and bottom mold members, the dome and recessed portions, of from about one to four thousandths of an inch, in the preferred form. The top portion of the mold is allowed to remain in its lowered position and in contact with the sheeting only during the time it is lowered into the recessed portion of the bottom element of the mold and momentarily after it has reached its lowermost position. The fusing or sealing of the membrane to the rim portion of the diaphragm is accomplished practically instantaneously on contact, and immediately after such contact the top member of the mold is raised. The formed diaphragm is then immersed in a cooling bath which causes the dome-shaped portion of the diaphragm to set in the shape of the mold.

Some changes may be made in the details of procedure 4 involved in the practice of the method of this invention and m the constructlon and parts of the apparatus used in carrying out the method and of the synthetic thermoplastic materials used in the fabrication of the pessary without departing from the spirit and scope of the invention; it is the intention of the inventors to include within the scope of the invention any variant modes of procedure and any modified forms of structure or use of mechanical equivalents and any synthetic thermoplastic materials which may be reasonably included within the scope of the invention as embodied in the following claims.

This application is a division of our U. S. application, Serial No. 66,912, filed December 23, 1948, now abandoned.

We claim:

1. The method of making a diaphragm which comprises positioning a sheet of flexible, impermeable, synthetic' thermoplastic substance on one side of a circular rim of synthetic, resilient, thermoplastic substance, having a diameter less than the sheet, so that the sheet is substantially flat, in touching relation to the rim, and extends beyond the outer circumference of the rim; firmly holding in place the portion of the sheet extending beyond the outer circumference of the rim, deforming the sheet at an elevated temperature into a dome, heat sealing the sheet to the rim, the dome being positioned at the inner circumference and beyond the rim on the side opposite the seal of the sheet to the rim, and removing the portion of the sheet then extending beyond the outer circumference of the rim, whereby a diaphragm is made with a continuous rim integral with a flexible domeshaped membrane.

2. A process according to claim 1 in which the substance of the rim and sheet is polymerized ethylene having an average molecular weight within the range of 15,000 to 22,000.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 892,702 Wyman July 7, 1908 893,739 Latham July 21, 1908 1,308,330 Brown July 1, 1919 1,388,123 Roberts Aug. 16, 1921 1,856,694 De Correvont May 3, 1932 2,111,313 Clark Mar. 15, 1938 2,210,509 Strauch Aug. 6, 1940 2,378,642 Kopplin June 19, 1945 2,402,943 Bogoslowsky July 2, 1946

Claims (1)

1. THE METHOD OF MAKING A DIAPHRAGM WHICH COMPRISES POSITIONING A SHEET OF FLEXIBLE, IMPERMEABLE, SYNTHETIC THERMOPLASTIC SUBSTANCE ON ONE SIDE OF A CIRCULAR RIM OF SYNTHETIC, RESILIENT, THERMOPLASTIC SUBSTANCE, HAVING A DIAMETER LESS THAN THE SHEET, SO THAT THE SHEET IS SUBSTANTIALLY FLAT, IN TOUCHING RELATION TO THE RIM, AND EXTENDS BEYOND THE OUTER CIRCUMFERENCE OF THE RIM, AND HOLDING IN PLACE THE PORTION OF THE SHEET EXTENDING BEYOND THE OUTER CIRCUMFERENCE OF THE RIM, DEFORMING THE SHEET AT AN ELEVATED TEMPERATURE INTO A DOME, HEAT SEALING THE SHEET TO THE RIM, THE DOME BEING POSITIONED AT THE INNER CIRCUMFERENCE AND BEYOND THE RIM ON THE SIDE OPPOSITE THE SEAL OF THE SHEET TO THE RIM, AND REMOVING THE PORTION OF THE SHEET THEN EXTENDING BEYOND THE OUTER CIRCUMFERENCE OF THE RIM, WHEREBY A DIAPHRAGM IS MADE WITH A CONTINUOUS RIM INTEGRAL WITH A FLEXIBLE DOMESHAPED MEMBRANE.
US23841451 1948-12-23 1951-07-25 Method of making a diaphragm Expired - Lifetime US2697057A (en)

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Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2831527A (en) * 1952-04-24 1958-04-22 Sanitary Products Corp Method of applying a film tip to a tampon
US2849026A (en) * 1955-12-12 1958-08-26 John F Taplin Flexible fluid sealing diaphragm
US2878524A (en) * 1954-04-09 1959-03-24 Essex Paper Box Mfg Co Inc Method of constructing a wall and plastic window assembly
US2957792A (en) * 1954-04-19 1960-10-25 Sidney H Magid Method of heat sealing edge bindings around openings in hollow thermoplastic bodies
US3015598A (en) * 1958-11-03 1962-01-02 Jones John Leslie Manufacturing absorbent diaphragms
US3047910A (en) * 1959-11-24 1962-08-07 Plastomer Dev Corp Method of making thermoplastic tubular container
US3060931A (en) * 1960-05-13 1962-10-30 John T Clark Diaphragm and method of making
US3102541A (en) * 1961-07-10 1963-09-03 Warren E Adams Catamenial device
US3135173A (en) * 1961-10-26 1964-06-02 Midland Ross Corp Diaphragm
US3216422A (en) * 1962-11-23 1965-11-09 Johnson & Johnson Vaginal tampon
US3340714A (en) * 1963-11-19 1967-09-12 Bell Telephone Labor Inc Method for deforming metal-plastic laminates
US3523857A (en) * 1967-04-21 1970-08-11 Chem Rubber Products Inc Diaphragm assembly
US4107829A (en) * 1976-04-05 1978-08-22 Tachikawa Spring Co., Ltd. Method of manufacturing seat cushions
US4200090A (en) * 1979-01-15 1980-04-29 The Procter & Gamble Company Vaginal contraceptive and method of using
US4219016A (en) * 1978-12-07 1980-08-26 The Procter & Gamble Company Vaginal contraceptive
US4225553A (en) * 1977-07-05 1980-09-30 Toyo Seikan Kaisha, Limited Method of manufacturing low-rigid, wrinkle-free articles
DE3041164A1 (en) * 1979-10-31 1981-05-14 Tachikawa Spring Co A method of manufacturing a seat cushion
US4304226A (en) * 1980-03-03 1981-12-08 The Procter & Gamble Company Vaginal contraceptive
DE3050152A1 (en) * 1979-12-31 1982-03-25 R Goepp Custom valved cervical cap
EP0135283A2 (en) * 1983-07-14 1985-03-27 Southern Research Institute Disposable spermicide-releasing diaphragm
US4640272A (en) * 1983-10-11 1987-02-03 Edward Monett Springless diaphragms and method of producing same
DK151179B (en) * 1977-04-29 1987-11-09 Ortho Pharma Corp Vaginalmembran, procedure for making the same
US6241846B1 (en) 1996-07-03 2001-06-05 Ultrafem, Inc. Apparatus for manufacturing elastomeric articles
US6264638B1 (en) 1989-12-07 2001-07-24 Ultrafem, Inc. Intravaginal drug delivery system and discharge collection device
US6796973B1 (en) 1989-12-07 2004-09-28 Instead, Inc. Vaginal discharge collection device and intravaginal drug delivery system
US20060260619A1 (en) * 2005-05-19 2006-11-23 Moench Thomas R Intravaginal device with improved rim designs and methods of making same

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US892702A (en) * 1907-07-23 1908-07-07 Arthur E Wyman Method of covering objects with sheet-pyroxylin.
US893739A (en) * 1907-12-12 1908-07-21 Boston Fast Color Eyelet Company Method of forming blanks for covering eyelets.
US1309330A (en) * 1919-07-08 Method osi
US1388123A (en) * 1917-10-26 1921-08-16 Paramount Rubber Cons Inc Method of making hollow rubber articles
US1856694A (en) * 1929-11-01 1932-05-03 Brunswickbalke Collender Compa Apparatus for covering articles
US2111313A (en) * 1937-03-26 1938-03-15 John T Clark Rubber diaphragm and method of making the same
US2210509A (en) * 1937-05-17 1940-08-06 Hartford Empire Co Method of forming over objects
US2378642A (en) * 1941-09-02 1945-06-19 Burkart Mfg Company F Process of making fiber-body articles
US2402943A (en) * 1942-11-21 1946-07-02 Bogoslowsky Boris Container

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1309330A (en) * 1919-07-08 Method osi
US892702A (en) * 1907-07-23 1908-07-07 Arthur E Wyman Method of covering objects with sheet-pyroxylin.
US893739A (en) * 1907-12-12 1908-07-21 Boston Fast Color Eyelet Company Method of forming blanks for covering eyelets.
US1388123A (en) * 1917-10-26 1921-08-16 Paramount Rubber Cons Inc Method of making hollow rubber articles
US1856694A (en) * 1929-11-01 1932-05-03 Brunswickbalke Collender Compa Apparatus for covering articles
US2111313A (en) * 1937-03-26 1938-03-15 John T Clark Rubber diaphragm and method of making the same
US2210509A (en) * 1937-05-17 1940-08-06 Hartford Empire Co Method of forming over objects
US2378642A (en) * 1941-09-02 1945-06-19 Burkart Mfg Company F Process of making fiber-body articles
US2402943A (en) * 1942-11-21 1946-07-02 Bogoslowsky Boris Container

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2831527A (en) * 1952-04-24 1958-04-22 Sanitary Products Corp Method of applying a film tip to a tampon
US2878524A (en) * 1954-04-09 1959-03-24 Essex Paper Box Mfg Co Inc Method of constructing a wall and plastic window assembly
US2957792A (en) * 1954-04-19 1960-10-25 Sidney H Magid Method of heat sealing edge bindings around openings in hollow thermoplastic bodies
US2849026A (en) * 1955-12-12 1958-08-26 John F Taplin Flexible fluid sealing diaphragm
US3015598A (en) * 1958-11-03 1962-01-02 Jones John Leslie Manufacturing absorbent diaphragms
US3047910A (en) * 1959-11-24 1962-08-07 Plastomer Dev Corp Method of making thermoplastic tubular container
US3060931A (en) * 1960-05-13 1962-10-30 John T Clark Diaphragm and method of making
US3102541A (en) * 1961-07-10 1963-09-03 Warren E Adams Catamenial device
US3135173A (en) * 1961-10-26 1964-06-02 Midland Ross Corp Diaphragm
US3216422A (en) * 1962-11-23 1965-11-09 Johnson & Johnson Vaginal tampon
US3340714A (en) * 1963-11-19 1967-09-12 Bell Telephone Labor Inc Method for deforming metal-plastic laminates
US3523857A (en) * 1967-04-21 1970-08-11 Chem Rubber Products Inc Diaphragm assembly
US4107829A (en) * 1976-04-05 1978-08-22 Tachikawa Spring Co., Ltd. Method of manufacturing seat cushions
DK151179B (en) * 1977-04-29 1987-11-09 Ortho Pharma Corp Vaginalmembran, procedure for making the same
US4365499A (en) * 1977-07-05 1982-12-28 Toyo Seikan Kaisha, Limited Method of manufacturing formed articles, equipment for practicing same, and formed articles manufactured by the method
US4225553A (en) * 1977-07-05 1980-09-30 Toyo Seikan Kaisha, Limited Method of manufacturing low-rigid, wrinkle-free articles
US4219016A (en) * 1978-12-07 1980-08-26 The Procter & Gamble Company Vaginal contraceptive
US4200090A (en) * 1979-01-15 1980-04-29 The Procter & Gamble Company Vaginal contraceptive and method of using
DE3041164A1 (en) * 1979-10-31 1981-05-14 Tachikawa Spring Co A method of manufacturing a seat cushion
DE3050152A1 (en) * 1979-12-31 1982-03-25 R Goepp Custom valved cervical cap
US4304226A (en) * 1980-03-03 1981-12-08 The Procter & Gamble Company Vaginal contraceptive
EP0135283A2 (en) * 1983-07-14 1985-03-27 Southern Research Institute Disposable spermicide-releasing diaphragm
EP0135283A3 (en) * 1983-07-14 1986-03-19 Southern Research Institute Disposable spermicide-releasing diaphragm
US4589880A (en) * 1983-07-14 1986-05-20 Southern Research Institute Disposable spermicide-releasing diaphragm
US4640272A (en) * 1983-10-11 1987-02-03 Edward Monett Springless diaphragms and method of producing same
US6264638B1 (en) 1989-12-07 2001-07-24 Ultrafem, Inc. Intravaginal drug delivery system and discharge collection device
US6796973B1 (en) 1989-12-07 2004-09-28 Instead, Inc. Vaginal discharge collection device and intravaginal drug delivery system
US6241846B1 (en) 1996-07-03 2001-06-05 Ultrafem, Inc. Apparatus for manufacturing elastomeric articles
US20060260619A1 (en) * 2005-05-19 2006-11-23 Moench Thomas R Intravaginal device with improved rim designs and methods of making same
US7845355B2 (en) 2005-05-19 2010-12-07 Reprotect, Inc. Intravaginal device with improved rim designs and methods of making same

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