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US1994135A - Diaper - Google Patents

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Publication number
US1994135A
US1994135A US70290533A US1994135A US 1994135 A US1994135 A US 1994135A US 70290533 A US70290533 A US 70290533A US 1994135 A US1994135 A US 1994135A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
diaper
sheet
cover
folded
triangular
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
Application number
Inventor
Horowitz Nathan
Original Assignee
John Schrott
Henry Horowitz
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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    • 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/49001Absorbent articles specially adapted to be worn around the waist, e.g. diapers having preferential bending zones, e.g. fold lines or grooves
    • 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/53409Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad having a folded core

Description

March 12, 1935. N. HOROWITZ DIAPER Filed Dec. 18, 1953 INVENTOR Nnnmw Hofiow l T Z. BY

Patented Mar. 12 1935 UNITED STATES I DIAPER Nathan Horowitz, Brooklyn, N. Y., assignor of twenty per cent to John Schrott and twenty per cent to Henry Horowitz, both of New York, N. Y.

Application December 18, 1933, Serial No. 702,905

3 Claims.

This invention relates to new and useful improvements in diapers.

More particularly this invention relates todiapers constructed of cheap material such as paper, etc. so that they may be discarded after being used once.

The invention has'for an object to construct a cheap diaper characterized by a folded sheet cover completely encasing a pad by the folded sections thereof.

Still further it is proposed to construct the diaper so that the folded sheet cover also encases a waterproof sheet.

As another object of this invention it is proposed to so fold the sheet cover that the diaper is of triangular shape with the pad at the center so that the center portion is thick and reinforced while the apexes remain thin.

Furthermore the invention also proposes an arrangement whereby tape is utilized for attaching the diaper upon a baby.

This'invention still further proposes the provision of gummed tape for the attachment arranged so that portions thereof may be pasted down to hold the diaper in position when used.

Still further the invention contemplates a particular manner of folding the sheet cover so as to securely encase the pad and furthermore so as to cover up many of the edges producing a diaper with relatively few free edges.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawing forming a mate rial part of this disclosure:

Fig. l is an elevational view of the diaper.

Fig. 2 is an elevational view of the sheet cover used in constructing the casing of the diaper.

Fig. 3 is a perspective view of a water-proof sheet used in the diaper.

Fig. 4 is a perspective view of the pad used in the diaper.

Fig. 5 is a view similar to Fig. 2 but showing the sheet cover partially folded during the manufacture of the diaper.

Fig. 6 is a view similar to Fig. 5 but showing the sheet cover in a further stage of folding.

Fig. 7 is a view similar to Fig. 6 but showing the diaper in the last stage of folding.

The diaper according to this invention comprises a folded sheet cover 10 of triangular shape with a rectangular pad 11 encased therein at the center forming a reinforced seat portion and having the apexes relatively thin. A tape 12 is extended across the hypotenuse of the triangular shape and has a gummed end 13 projecting for the purpose of being pasted down after the diaper is engaged around the waist of a baby. Another tape 14 extends along the altitude of the triangular shape and-has a gummed projecting end 15 adapted to be pasted down for holding the lower corner of the diaper in position when the diaper is worn.

The cover 10 is formed from a rectangular sheet of material 16 bent along certaindiagonal and altitude lines. This strip is folded by starting at one end and first folding along the diagonal 1'2 and then the altitude 18, the diagonal 19 the altitude 20 and finally the diagonal 21, always folding in the same direction. These diagonals and altitudes divide 01f triangular sections 22, 23, 2e, 25, 26 and 27 constituting layers of the diaper. During the folding operation a water-proof sheet 28 of triangular shape and the rectangular shaped pad 11 is placed upon one of the intermediate triangular sections, preferably the section 2 so as to be encased by the strip when completely folded. The pad 11 may be made of soft paper or cotton padding or other material. The water proof triangular piece 28 may be waxed paper or other water proof paper. The strip. 16 itself is of soft white crepe paper or other similar material.

The folding of the diaper can best be under stood by examining Figs. 5-7 inclusive. The first step consists in folding the section 22 along the altitude 17 so as to be disposed immediately over the section 23. Then this double layer of material is bent along the altitude lu to be disposed over the section 24 and over the waterproof sheet 28 and the pad 11 upon the section 24. Next this triple layer of material and the water-proof sheet 28 and pad ll is bent along the diagonal 19 to be disposed upon the layer 25 as illustrated in Fig. 6. This four layer material is then bent along the altitude 20 to be disposed upon the triangular section 26 as illustrated in Fig. '7 and finally the five layer material is bent along the diagonal 21 to be disposed upon the section 27. This section 27 is equipped with the tapes 12 and 14 as previously described.

The feature of the diaper lies in the fact that it is formed from one strip of material which is folded into triangular layers one upon the other and in the same direction so as to wrap up the water-proof sheet 28 and the pad ll.

The diaper thus manufactured may be produced at a very low cost and has no objectionable elements such as eyelets etc. for holding the layers thereof together which would engage from the spirit or the scope of the" appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is:

1. In a diaper, a sheet cover of triangular shape folded from sheet material a suflicient number of times in the same direction so as to form an in-, teri or pocket closed on all sides with folds, and

a pad in said pocket, and said cover being formed of a rectangular strip of greater length than width with triangular sections folded therefrom continuous in one direction with each succeeding section outside of the previous section.

2. A diaper, comprising a folded sheet cover of triangular shape with a rectangular pad within the cover at the center thereof leaving the corners thin while reinforcing the center seat portion thereof, said cover being formed from a rectangular strip having one corner folded upon a diagonal so that the bottom edge constitutes an altitude, said double triangular sections folded in the same direction upon the altitude of the strip and over said pad, said triple triangular sections folded upon a diagonal in the same direction so that the vtop constitutes an altitude, said four layers material folded upon the altitude in the same direction, and said five layer material folded upon the diagonal in the same direction 3. A diaper, comprising a folded sheet cover of triangular shape, with a pad therein at the center thereof, and said cover material being formed from a rectangular strip folded into triangular sections progressively from one end thereof to the other end, said pad being thus encased within the cover during the folding operation between sections of said strip forming a receiving and holding pocket with all sides closed with folds from said strip.

NATHAN HOROWITZ.

US1994135A 1933-12-18 1933-12-18 Diaper Expired - Lifetime US1994135A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US1994135A US1994135A (en) 1933-12-18 1933-12-18 Diaper

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Application Number Priority Date Filing Date Title
US1994135A US1994135A (en) 1933-12-18 1933-12-18 Diaper

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649858A (en) * 1951-01-09 1953-08-25 Cromwell Paper Co Disposable baby diaper
US2860637A (en) * 1954-03-12 1958-11-18 Stamberger Paul Diapers
US3938523A (en) * 1974-10-17 1976-02-17 Scott Paper Company Prefolded and packaged disposable diaper
US20040167489A1 (en) * 2003-02-14 2004-08-26 Kellenberger Stanley R. Compact absorbent article
US20040176735A1 (en) * 2003-03-04 2004-09-09 Snell Alan K. Packaged diaper, related accessories and packaging system
US20050015052A1 (en) * 2003-07-17 2005-01-20 Michelle Klippen Compression packed absorbent article
US20050102139A1 (en) * 2003-11-11 2005-05-12 Canon Kabushiki Kaisha Information processing method and apparatus
US20050143700A1 (en) * 2003-03-04 2005-06-30 Diaperoos, Llc Manufacture of vacuum-packed diaper
US20050155896A1 (en) * 2003-03-04 2005-07-21 Diaperoos, Llc Pressing and vacuum-sealing diaper in vacuum chamber
US20060179794A1 (en) * 2000-04-26 2006-08-17 Diaperoos, Llc Carrying vacuum-packaged diaper in pocket on person
US20060206084A1 (en) * 2000-04-26 2006-09-14 Diaperoos, Llc Portable Set of Compact Absorbent Articles
US20060206081A1 (en) * 2000-04-26 2006-09-14 Diaperoos, Llc Vacuum-Packaging Diaper
US20060206080A1 (en) * 2000-04-26 2006-09-14 Diaperoos, Llc Vacuum-Packaged Absorbent Article
US20060201112A1 (en) * 2000-04-26 2006-09-14 Diaperoos, Llc Reconfiguring and Vacuum-Packaging Diaper
US20060206078A1 (en) * 2000-04-26 2006-09-14 Diaperoos, Llc Vacuum-Packaged Diaper
US20060206082A1 (en) * 2000-04-26 2006-09-14 Diaperoos, Llc Vacuum-Packaging Diaper in Normal Condition
US20060206083A1 (en) * 2000-04-26 2006-09-14 Diaperoos, Llc Set of Compact Absorbent Articles
US20070157812A1 (en) * 2004-07-02 2007-07-12 Heinz-Joachim Muller Gas transfer membrane
US7300022B2 (en) 2000-11-13 2007-11-27 Siemens Water Technologies Corp. Modified membranes
US20080128295A1 (en) * 2003-03-04 2008-06-05 Diaperoos, Llc Package having vacuum packed absorbent article and methods thereof
US20080142389A1 (en) * 2003-03-04 2008-06-19 Diaperoos, Llc Package having vacuum packed absorbent article and methods thereof
US20080214687A1 (en) * 2005-06-20 2008-09-04 Heinz-Joachim Muller Cross Linking Treatment of Polymer Membranes
US20090230053A1 (en) * 2004-12-03 2009-09-17 Siemens Water Technologies Corp. Membrane post treatment
US20100000942A1 (en) * 2006-07-14 2010-01-07 Heinz Joachim Muller Monopersulfate treatment of membranes
US20100213117A1 (en) * 2003-07-08 2010-08-26 Daniel Mullette Membrane post treatment
US20110147308A1 (en) * 2009-12-21 2011-06-23 Siemens Water Technologies Corp. Charged Porous Polymeric Membranes and Their Preparation
US7988891B2 (en) 2005-07-14 2011-08-02 Siemens Industry, Inc. Monopersulfate treatment of membranes
US8524794B2 (en) 2004-07-05 2013-09-03 Siemens Industry, Inc. Hydrophilic membranes
US9868834B2 (en) 2012-09-14 2018-01-16 Evoqua Water Technologies Llc Polymer blend for membranes

Cited By (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2649858A (en) * 1951-01-09 1953-08-25 Cromwell Paper Co Disposable baby diaper
US2860637A (en) * 1954-03-12 1958-11-18 Stamberger Paul Diapers
US3938523A (en) * 1974-10-17 1976-02-17 Scott Paper Company Prefolded and packaged disposable diaper
US20060206083A1 (en) * 2000-04-26 2006-09-14 Diaperoos, Llc Set of Compact Absorbent Articles
US20060206084A1 (en) * 2000-04-26 2006-09-14 Diaperoos, Llc Portable Set of Compact Absorbent Articles
US20060206081A1 (en) * 2000-04-26 2006-09-14 Diaperoos, Llc Vacuum-Packaging Diaper
US20060206080A1 (en) * 2000-04-26 2006-09-14 Diaperoos, Llc Vacuum-Packaged Absorbent Article
US20060201112A1 (en) * 2000-04-26 2006-09-14 Diaperoos, Llc Reconfiguring and Vacuum-Packaging Diaper
US20060206082A1 (en) * 2000-04-26 2006-09-14 Diaperoos, Llc Vacuum-Packaging Diaper in Normal Condition
US20060206078A1 (en) * 2000-04-26 2006-09-14 Diaperoos, Llc Vacuum-Packaged Diaper
US20060179794A1 (en) * 2000-04-26 2006-08-17 Diaperoos, Llc Carrying vacuum-packaged diaper in pocket on person
US7300022B2 (en) 2000-11-13 2007-11-27 Siemens Water Technologies Corp. Modified membranes
US20040172002A1 (en) * 2003-02-14 2004-09-02 Nelson Denise J. Package enclosing a single disposable absorbent article
US20040168947A1 (en) * 2003-02-14 2004-09-02 Mcdonald Duane L. Packaging with easy open feature
US20040167490A1 (en) * 2003-02-14 2004-08-26 Nelson Denise J. Methods of folding disposable absorbent articles
US20040167489A1 (en) * 2003-02-14 2004-08-26 Kellenberger Stanley R. Compact absorbent article
US8118166B2 (en) 2003-02-14 2012-02-21 Kimberly-Clark Worldwide, Inc. Packaging with easy open feature
US20050143700A1 (en) * 2003-03-04 2005-06-30 Diaperoos, Llc Manufacture of vacuum-packed diaper
US20050159718A1 (en) * 2003-03-04 2005-07-21 Diaperoos, Llc Accordion folded absorbent article
US20050155895A1 (en) * 2003-03-04 2005-07-21 Diaperoos, Llc Vacuum-packing diaper and pressing encasement
US20050155897A1 (en) * 2003-03-04 2005-07-21 Diaperoos, Llc Indicia viewable through encasement of vacuum-packed diaper
US20050155898A1 (en) * 2003-03-04 2005-07-21 Diaperoos, Llc Indicia of reduced diaper viewable through encasement
US20050159723A1 (en) * 2003-03-04 2005-07-21 Diaperoos, Llc Indicia of folded diaper viewable through encasement
US20050155900A1 (en) * 2003-03-04 2005-07-21 Diaperoos, Llc Disguisedly packaged vacuum-sealed diaper
US20050155875A1 (en) * 2003-03-04 2005-07-21 Diaperoos, Llc Toy container for volumetrically reduced diaper
US20050155327A1 (en) * 2003-03-04 2005-07-21 Diaperoos, Llc Disguisedly packaging absorbent article
US20050155328A1 (en) * 2003-03-04 2005-07-21 Diaperoos, Llc Disguisedly packaging vacuum-sealed diaper
US20050155896A1 (en) * 2003-03-04 2005-07-21 Diaperoos, Llc Pressing and vacuum-sealing diaper in vacuum chamber
US20050189307A1 (en) * 2003-03-04 2005-09-01 Diaperoos, Llc Vacuum-packed diaper vending machine
US20060052761A1 (en) * 2003-03-04 2006-03-09 Snell Alan K Packaged diaper, related accessories and packaging system
US20080142389A1 (en) * 2003-03-04 2008-06-19 Diaperoos, Llc Package having vacuum packed absorbent article and methods thereof
US20050143705A1 (en) * 2003-03-04 2005-06-30 Diaperoos, Llc Dispenser for individually dispensing vacuum-packed diapers
US20050139503A1 (en) * 2003-03-04 2005-06-30 Diaperoos, Llc Vacuum-packing diaper at millibars of pressure
US20050143702A1 (en) * 2003-03-04 2005-06-30 Diaperoos, Llc Integrally vacuum-packed diaper and accessories
US20050138894A1 (en) * 2003-03-04 2005-06-30 Diaperoos, Llc Integrally vacuum-packing diaper and accessories
US20080128295A1 (en) * 2003-03-04 2008-06-05 Diaperoos, Llc Package having vacuum packed absorbent article and methods thereof
US20050143706A1 (en) * 2003-03-04 2005-06-30 Diaperoos, Llc Compartmentalized vacuum-packed diaper kit
US20050131368A2 (en) * 2003-03-04 2005-06-16 Diaperoos, Llc Vacuum-packed diaper
US20060231429A1 (en) * 2003-03-04 2006-10-19 Diaperoos, Llc Infant care kit including diaper
US7150354B2 (en) 2003-03-04 2006-12-19 Diaperoos, Llc Vacuum-packed diaper feeding kit
US7178312B2 (en) 2003-03-04 2007-02-20 Diaperoos, Llc Pressing and vacuum-packing diaper
US7181893B2 (en) 2003-03-04 2007-02-27 Diaperoos, Llc Vacuum-packing diaper and pressing encasement
US7181894B2 (en) 2003-03-04 2007-02-27 Diaperoos, Llc Pressing and vacuum-sealing diaper in vacuum chamber
US7779610B2 (en) 2003-03-04 2010-08-24 Diaperoos, Llc Method of vacuum packaging a single use disposable diaper
US7194848B2 (en) 2003-03-04 2007-03-27 Diaperoos, Llc Diaper kit with miniaturized diaper by folding and vacuum-sealing
US20070107382A1 (en) * 2003-03-04 2007-05-17 Diaperoos, Llc Folding and vacuum-sealing diaper with diaper accessory
US20070107383A1 (en) * 2003-03-04 2007-05-17 Diaperoos, Llc Container having diaper accessory and miniaturized diaper
US20070130886A1 (en) * 2003-03-04 2007-06-14 Diaperoos, Llc Miniaturizing diaper by folding and vacuum-sealing
US7231751B2 (en) 2003-03-04 2007-06-19 Diaperoos, Llc Packaging diaper with deceptive outward appearance
US7770733B2 (en) 2003-03-04 2010-08-10 Diaperoos, Llc Pocket-sized vacuum-packed diapers
US7243477B2 (en) 2003-03-04 2007-07-17 Diaperoos, Llc Packaging diaper with deceptive size including vacuum-sealing
US20040176735A1 (en) * 2003-03-04 2004-09-09 Snell Alan K. Packaged diaper, related accessories and packaging system
US7188748B2 (en) 2003-03-04 2007-03-13 Diaperoos, Llc Vacuum-packed diaper vending machine
US20090071862A2 (en) * 2003-03-04 2009-03-19 Diaperoos, Llc Indicia of reduced diaper viewable through encasement
US8057574B2 (en) 2003-07-08 2011-11-15 Siemens Industry, Inc. Membrane post treatment
US8262778B2 (en) 2003-07-08 2012-09-11 Siemens Industry, Inc. Membrane post treatment
US20100213117A1 (en) * 2003-07-08 2010-08-26 Daniel Mullette Membrane post treatment
US20050015052A1 (en) * 2003-07-17 2005-01-20 Michelle Klippen Compression packed absorbent article
US20050165377A1 (en) * 2003-07-17 2005-07-28 Diaperoos, Llc Accordion folded absorbent article
US20050102139A1 (en) * 2003-11-11 2005-05-12 Canon Kabushiki Kaisha Information processing method and apparatus
US7819956B2 (en) 2004-07-02 2010-10-26 Siemens Water Technologies Corp. Gas transfer membrane
US20070157812A1 (en) * 2004-07-02 2007-07-12 Heinz-Joachim Muller Gas transfer membrane
US8524794B2 (en) 2004-07-05 2013-09-03 Siemens Industry, Inc. Hydrophilic membranes
US20090230053A1 (en) * 2004-12-03 2009-09-17 Siemens Water Technologies Corp. Membrane post treatment
US7867417B2 (en) 2004-12-03 2011-01-11 Siemens Water Technologies Corp. Membrane post treatment
US20080214687A1 (en) * 2005-06-20 2008-09-04 Heinz-Joachim Muller Cross Linking Treatment of Polymer Membranes
US7988891B2 (en) 2005-07-14 2011-08-02 Siemens Industry, Inc. Monopersulfate treatment of membranes
US20100000942A1 (en) * 2006-07-14 2010-01-07 Heinz Joachim Muller Monopersulfate treatment of membranes
US20110147308A1 (en) * 2009-12-21 2011-06-23 Siemens Water Technologies Corp. Charged Porous Polymeric Membranes and Their Preparation
US9868834B2 (en) 2012-09-14 2018-01-16 Evoqua Water Technologies Llc Polymer blend for membranes

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