US3094083A - Method of making bags - Google Patents

Method of making bags Download PDF

Info

Publication number
US3094083A
US3094083A US8896361A US3094083A US 3094083 A US3094083 A US 3094083A US 8896361 A US8896361 A US 8896361A US 3094083 A US3094083 A US 3094083A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
bag
plastic
paper
tubing
length
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
Arnold N Weeks
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.)
Bemis Bro Bag Co
Original Assignee
Bemis Bro Bag Co
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
Grant date

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00Making flexible containers, e.g. envelopes or bags
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00Flexible containers made from webs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00Shape of flexible containers
    • B31B2160/10Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2170/00Construction of flexible containers
    • B31B2170/20Construction of flexible containers having multi-layered walls, e.g. laminated or lined
    • B31B2170/204Construction of flexible containers having multi-layered walls, e.g. laminated or lined involving folding a web about an already tubular web
    • 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
    • Y10S206/00Special receptacle or package
    • Y10S206/82Separable, striplike plural articles
    • 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
    • Y10S55/00Gas separation
    • Y10S55/05Methods of making filter
    • 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
    • Y10T156/1007Running or continuous length work
    • Y10T156/1008Longitudinal bending
    • Y10T156/1013Longitudinal bending and edge-joining of one piece blank to form tube
    • 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
    • Y10T156/1084Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing of continuous or running length bonded web
    • 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
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24033Structurally defined web or sheet [e.g., overall dimension, etc.] including stitching and discrete fastener[s], coating or bond

Description

June 18, 1963 A. N. WEEKS METHOD OF MAKING BAGS 2 Sheets-Sheet 1 Filed Feb. 15, 1961 v June 18, 1963 A. N. WEEKS METHOD OF MAKING BAGS 2 Sheets-Sheet 2 Filed Feb. 15, 1961 i y 11 a r 1; s7, t; h 2 AJIW MN m% United States Patent Ofi souri Filed Feb. 13, 1961, Ser. No. 88,963 Claims. (Cl. 11210) This invention relates to methods of making multi-wall paper bags having a tubular sheet plastic liner.

Among the several objects of this invention may be. noted the provision of methods of economically manrufactoring in quantity production sewn multi-wall paper bags having a liner which consists of a separate tube of sheet plastic material, the liner being hermetically heatsealed at the bottom of the bag to prevent ingress of. :3 moisture and the bag also being sewn at the bottom to provide a strong bottom closure without the hermetic seal. Other objects and features W111 be in part apparent and in part pointed out hereinafter.

The invention accordingly comprises the methods here-, inafter described, the scope of the invention being indicated in the following claims.

'In the accompanying drawings, in which several of various possible embodiments of the invention are illustrated,

FIG. 1 is a perspective view illustrating a first step in the manufacture of bags according to invention;

FIG. 2 is a plan view illustrating concluding steps of a first method of this invention for making .a first type of bag;

'FIG. 3 is a perspective view illustrating a bag made by i the method illustrated in FIGS. 1 and 2;

FIG. 4 is a cross section taken on line 44 of FIG. 3, thicknesses being exaggerated;

FIG. 5 is a cross section takenon line 55 of FIG. 3, y

thicknesses being exaggerated and parts being broken away to reduce the height of the view.

Corresponding reference characters indicate corresponding parts throughout the drawing.

Referring to the drawings, FIG. 1 illustrates a first step common to the methods of this invention for making multi-wall paper bags having a tubular sheet plastic liner. As shown therein, flexible heat-scalable sheet plastic tubing 1 (polyethylene tubing, for example) is drawn from a supply roll 3 and provided with transverse heat seals 5 spaced at bag length intervals along the tube. Transverse lines of perforations 7 are made in the tubing (through both walls of the tubing), these lines being spaced at bag length intervals, and spaced from but ad acent to the transverse heat seals. The spacing between each line of perforations and the adjacent heat seal is only a short distance, such as, for example, one inch.

A paper web 1 1 (which may be a multi-ply paper web, although shown in the drawings as a single web for simplicity) is then formed into a tube 13 around the plastic tubing with the longitudinal edges of the paper web lapped and adhered together as indicated at 15. The formation of the paper web into a tube around the plastic tubing is carried out by means of a suitable conventional tuber, such as is well known in the art, while the plastic tubing and the paper web are fed in the direction indicated by the arrow in FIG. 2. As shown in FIG. 2, web 11 is provided with transverse lines of perforations 17 3,094,083 Patented June 18, 1963 ice spaced at bag length intervals before the web is formed into tube 13 around the plastic tubing.

The paper web and the plastic tubing are fed at the same rate of speed and, when the web is formed into tube 13 around the plastic tubing, the lines of perforations 17 in the web are brought substantially into registration with the lines of perforations 7 in the plastic tubing.

The resulting composite paper and plastic tubing is then segmented into individual bag lengths by snapping off the latter at the end of the tubing on the registering lines of perforations 7 and 17. It will be understood that instead of initially providing perforations in the plastic tubing and paper web, the composite paper and plastic tubing could be segmented into individual bag lengths by cutting off the individual bag lengths a short distance from each heat seal with a conventional cutter. Each bag length comprises a plastic liner 1a within a paper tube 13a, with a transverse heat seal 5 across the plastic :liner adjacent one end of the bag length. Each bag length is then sewn across the width thereof on a line 19 between the heat seal 5 and the adjacent end of the bag.

As a result of the above described operations, a bag B (see FIGS. 3-5) is formed comprising an outer paper tube 13a (which may be a multi-ply paper tube) and a tubular sheet plastic liner 1a within the outer paper tube 13a. The liner is hermetically sealed at heat seal 5 adjacent one end of the bag to prevent ingress of moisture, and the bag has the sewn bottom seam 19 between the heat seal and the bottom of the bag to provide a strong bottom closure, with the needle holes made in sewing seam 19 below the seal 5 so that the hermetic seal is not affected.

The bag may be closed at the top after filling in various ways, such as, for example, bunching the top of the bag and tightly wire-tying, or providing a sewn top closure with a sealing tape over the sewing, or, if feasible for the type of paper used, heat-sealing and then sewing above the heat seal. When extensible paper is used, the paper may be folded down to expose the upper end of the plastic liner, which may then be heat-sealed, after which the paper may be brought back up and sewn.

FIG. 6 illustrates an alternative method of making paper bags with a tubular sheet plastic liner extending above the top of the outer paper tube. According to this method, flexible heat-scalable sheet plastic tubing 21 is provided with transverse heat seals 25 and transverse lines of perforations 27 adjacent the heat seals in essentially the same manner as shown in FIG. 1. However, each line of perforation and the adjacent heat seal may go more closely spaced than in the tubing shown in A paper web 81 is then formed into a tube 33 around the plastic tubing and the longitudinal edges of the paper web are overlapped and adhered together as indicated at 35 in conventional manner. The web is provided with transverse lines of perforations 37 spaced at intervals corresponding to the spacing of lines oi perforations 27. The Web 31 is formed into tube 33 around the plastic tubing 25 with the lines of perforations 37 offset from the lines of perforations 27 in the plastic tubing, and on the opposite side of lines 27 from the heat seals 25.

The resultant composite paper and plastic tubing is then segmented into individual bag lengths by snapping off the latter at the end of the tubing on the lines of perforations 27 and 37. Each bag length comprises a plastic liner 2111 having a cuff 39 extending outwardly from one end of paper tube 33a which surrounds the liner, with a transverse heat seal 25 across the plastic liner adjacent the other end of the tube 33a and spaced inward therefrom. Each bag length is then sewn acres the width thereof on a line 41 between the heat-sealed end 3 of the plastic liner and the adjacent end of the paper tube 33a.

As a result of the above described operations with respect to FIG. 7, a bag B1 (see FIGS. 7 and 8) is formed comprising an outer paper tube 33a (which may be a multiply tube) and a tubular sheet plastic liner 21a within the outer paper ply with the cuff 39 of the liner extending outward frornthe paper ply at the open end of the bag. The liner of the bag B1 is hermetically sealed at heat seal 25 adjacent one end of the liner to prevent ingress of moisture, and the bag has the sewn bottom seam 41 between the end of the liner adjacent the heat seal and the end of the bag to provide a strong bottom closure, with the needle holes in sewing seam 41 below the liner and heat seal so that the hermetic seal is not affected. The cuff extending above the paper ply may be conveniently heat sealed for closing of the bag, then folded down into the bag for sewing of a top closure.

In view of the above, it will be seen that the several objects of the invention are achieved and other advantageous results attained.

As various changes could be made in the above methods without departing from the scope of the invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not ina limiting sense.

I claim:

l. The method of manufacturing paper bags with 7 verse heat seals and locatedat intervals along the length of said composite tubing, whereby each bag length comprises a plastic liner within a paper tube with a transverse heat seal across the plastic liner spaced from and adjacent 1 one end of the bag length, and stitching each bag length across the width thereof along a line between said one end of the bag length and said heat seal.

2. The method of manufacturing paper bags with 4 thereof along a line between said one end of the bag length and said heat seal.

3. The method of manufacturing paper bags with plastic liners comprising providing a length of heat-sealable plastic tub-ing with transverse seals spaced at bag length intervals and perforations on transverse lines spaced from but adjacent to the heat seals, forming a paper Web having perforations on transverse lines spaced at bag length intervals into a tube around the plastic tubing, each line of perforations in the paper web being substantially in register with a line of perforations in the plastic tubing, segmenting the resultant composite tubing into individual bag lengths on the substantially registered lines of perforations, whereby each bag length comprises a plastic liner within a paper tube, the liner extending from one end of the paper tube to the other and having a trans verse heat seal spaced from and adjacent one end of the bag length, and stitching each bag length across the width thereof along a line between said one end of the bag length and said heat seal.

4. The method of manufacturing bags with plastic liners comprising providing a length of heat-scalable plastic tubing with transverse heat seals spaced at equal intervals and with perforations on transverse lines adjacent the heat seals, forming a paper web having perforations on transverse lines spaced at said intervals into a tube around the plastic tubing, each line of perforations in the paper webbeing longitudinally spaced from a line of perforations in the plastic tubing, segmenting the resultant composite tubing into individual bag lengths on the transverse lines of perforations, whereby each bag length comprises a plastic liner within a paper tube, one end of the liner being spaced inward from one end of the paper tube and the liner projecting'fromthe other end of the paper tube, the liner having a transverse heat seal spaced from and adjacent said one end of the paper tube, and

stitching each bag length across the width thereof along a line between said oneend of the paper tube and said heat seal.

5. The methof of claim 4 wherein each bag length is stitched on a line between said one end of the paper tube and the adjacent inwardly spaced end of the liner.

plastic liners comprising providing a length of heat-seal able plastic tubing with transverse heat seals spaced at bag length intervals, forming a paper web into a tube around the plastic tubing, segmenting the resultant tubing into individual bag lengths on transverse lines spaced from but adjacent to the transverse heat seals and located at bag length intervals along the length of said resultant tubing, whereby each bag length comprises a plastic liner within a paper tube with a transverse heat seal across the plastic liner spaced from and adjacent one end of the bag length, and stitching each bag length across the width References Cited in the file of this patent UNITED STATES PATENTS 2,095,910 "Bergstein Oct. 12, 1937 2,114,625 Bergstein Apr. 19, 1938 2,347,439 Shea et a1 Apr. 25, 1944 2,496,796 Kardon Feb. 7, 1950 2,737,860 Randall Mar. 13, 1956 2,751,140 Brady June 19, 1956 2,871,771 Mercer Feb. 3, 1959 2,896,516 Tilton et al. July 28, 1959 2,898,027 Scholle Aug. 4, 1959

Claims (1)

1. THE METHOD OF MANUFACTURING PAPER BAGS WITH PLASTIC LINERS COMPRISING PROVIDING A LENGTH OF HEAT-SEAL ABLE PLASTIC TUBING WITH TRANSVERSE HEAT SEAL SPACED AT INTERVALS ALONG THE LENGTH OF THE TUBING, FORMING A PAPER WEB INTO A TUBE AROUND THE PLASTIC TUBING, SEGMENTING THE RESULTANT COMPOSITE TUBING INTO INDIVIDUAL BAG LENGTHS ON TRANSVERSE LINES SPACED FROM BUT ADJACENT TO THE TRANSVERSE HEAT SEALS AND LOCATED AT INTERVALS ALONG THE LENGTH OF SAID COMPOSITE TUBING, WHEREBY EACH BAG LENGTH COMPRISES A PLASTIC LINER WITHIN A PAPER TUBE WITH A TRANSVERSE HEAT SEAL ACROSS THE PLASTIC LINER SPACED FROM AND ADJACENT ONE END OF THE BAG LENGTH, AND STITCHING EACH BAG LENGTH ACROSS THE WIDTH THEREOF ALONG A LINE BETWEEN SAID ONE END OF THE BAG LENGTH AND SAID HEAT SEAL.
US3094083A 1961-02-13 1961-02-13 Method of making bags Expired - Lifetime US3094083A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US3094083A US3094083A (en) 1961-02-13 1961-02-13 Method of making bags

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3094083A US3094083A (en) 1961-02-13 1961-02-13 Method of making bags

Publications (1)

Publication Number Publication Date
US3094083A true US3094083A (en) 1963-06-18

Family

ID=22214534

Family Applications (1)

Application Number Title Priority Date Filing Date
US3094083A Expired - Lifetime US3094083A (en) 1961-02-13 1961-02-13 Method of making bags

Country Status (1)

Country Link
US (1) US3094083A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3479802A (en) * 1965-02-23 1969-11-25 Studley Paper Co Multi-compartment vacuum cleaner filter bag
US3507731A (en) * 1966-10-31 1970-04-21 Leon M Timms Apparatus for forming lint removers or the like
US3607534A (en) * 1968-05-09 1971-09-21 Flexigrip Inc Bagmaking apparatuses
US4095542A (en) * 1976-10-15 1978-06-20 Hirschman Shalom Z Methods of making feminine hygienic pads
DE1818047C3 (en) * 1968-10-12 1983-11-24 Wilhelmstal-Werke Gmbh Papiersackfabriken, 7590 Achern, De
US4747815A (en) * 1985-05-02 1988-05-31 Mobil Oil Corporation Collection of bags and method of preparing the same
US4755164A (en) * 1986-12-23 1988-07-05 Hauni Richmond, Inc. Method of and apparatus for making applicators of pledgets and the like
US5045041A (en) * 1989-12-01 1991-09-03 Sepro Healthcare Inc. Method of manufacturing a reusable fabric-covered heat-exchange bag
US5192133A (en) * 1989-02-28 1993-03-09 Norsk Hydro A.S. Flexible container with improved bottom and top
US6145280A (en) * 1998-03-18 2000-11-14 Ntk Powerdex, Inc. Flexible packaging for polymer electrolytic cell and method of forming same
US6209469B1 (en) * 1998-11-09 2001-04-03 Perry E. Burton Apparatus and process for producing pillow shams
US6251154B1 (en) * 1992-05-06 2001-06-26 3M Innovative Properties Company Dust bag and method of production
US6632415B2 (en) 2001-04-09 2003-10-14 Chevron U.S.A. Inc. Methods for making molecular sieves
US20060005894A1 (en) * 2004-07-07 2006-01-12 Thomas Rose Method and apparatus for manufacturing double-walled liner
US20110021960A1 (en) * 2002-12-31 2011-01-27 Otivio As Device for applying a pulsating pressure to a local region of the body and the applications thereof

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2095910A (en) * 1936-07-08 1937-10-12 Edna May Bergstein Method of forming containers
US2114625A (en) * 1937-05-01 1938-04-19 Edna May Bergstein Method of forming containers
US2347439A (en) * 1939-09-21 1944-04-25 Us Envelope Co Method of and apparatus for making containers
US2496796A (en) * 1947-10-11 1950-02-07 Emanuel S Kardon Bag and method of making the same
US2737860A (en) * 1951-07-03 1956-03-13 Dickinson John & Co Ltd Method of manufacturing tubular bags, envelopes, and like containers with folded ends
US2751140A (en) * 1953-04-06 1956-06-19 Bemis Bro Bag Co Bag
US2871771A (en) * 1952-06-12 1959-02-03 Milprint Inc Art of producing side-gusseted bags
US2896516A (en) * 1957-02-28 1959-07-28 Raymond Bag Corp Liner inserting device
US2898027A (en) * 1956-12-04 1959-08-04 Scholle Chemical Corp Container for fluent materials

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2095910A (en) * 1936-07-08 1937-10-12 Edna May Bergstein Method of forming containers
US2114625A (en) * 1937-05-01 1938-04-19 Edna May Bergstein Method of forming containers
US2347439A (en) * 1939-09-21 1944-04-25 Us Envelope Co Method of and apparatus for making containers
US2496796A (en) * 1947-10-11 1950-02-07 Emanuel S Kardon Bag and method of making the same
US2737860A (en) * 1951-07-03 1956-03-13 Dickinson John & Co Ltd Method of manufacturing tubular bags, envelopes, and like containers with folded ends
US2871771A (en) * 1952-06-12 1959-02-03 Milprint Inc Art of producing side-gusseted bags
US2751140A (en) * 1953-04-06 1956-06-19 Bemis Bro Bag Co Bag
US2898027A (en) * 1956-12-04 1959-08-04 Scholle Chemical Corp Container for fluent materials
US2896516A (en) * 1957-02-28 1959-07-28 Raymond Bag Corp Liner inserting device

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3479802A (en) * 1965-02-23 1969-11-25 Studley Paper Co Multi-compartment vacuum cleaner filter bag
US3507731A (en) * 1966-10-31 1970-04-21 Leon M Timms Apparatus for forming lint removers or the like
US3607534A (en) * 1968-05-09 1971-09-21 Flexigrip Inc Bagmaking apparatuses
DE1818047C3 (en) * 1968-10-12 1983-11-24 Wilhelmstal-Werke Gmbh Papiersackfabriken, 7590 Achern, De
US4095542A (en) * 1976-10-15 1978-06-20 Hirschman Shalom Z Methods of making feminine hygienic pads
US4747815A (en) * 1985-05-02 1988-05-31 Mobil Oil Corporation Collection of bags and method of preparing the same
US4755164A (en) * 1986-12-23 1988-07-05 Hauni Richmond, Inc. Method of and apparatus for making applicators of pledgets and the like
US5192133A (en) * 1989-02-28 1993-03-09 Norsk Hydro A.S. Flexible container with improved bottom and top
US5045041A (en) * 1989-12-01 1991-09-03 Sepro Healthcare Inc. Method of manufacturing a reusable fabric-covered heat-exchange bag
US6251154B1 (en) * 1992-05-06 2001-06-26 3M Innovative Properties Company Dust bag and method of production
US6145280A (en) * 1998-03-18 2000-11-14 Ntk Powerdex, Inc. Flexible packaging for polymer electrolytic cell and method of forming same
US6209469B1 (en) * 1998-11-09 2001-04-03 Perry E. Burton Apparatus and process for producing pillow shams
US6632415B2 (en) 2001-04-09 2003-10-14 Chevron U.S.A. Inc. Methods for making molecular sieves
US20110021960A1 (en) * 2002-12-31 2011-01-27 Otivio As Device for applying a pulsating pressure to a local region of the body and the applications thereof
US8021314B2 (en) * 2002-12-31 2011-09-20 Otivio As Device for applying a pulsating pressure to a local region of the body and the applications thereof
US8361001B2 (en) 2002-12-31 2013-01-29 Otivio As Device for applying a pulsating pressure to a local region of the body and the applications thereof
US20060005894A1 (en) * 2004-07-07 2006-01-12 Thomas Rose Method and apparatus for manufacturing double-walled liner
US7354496B2 (en) * 2004-07-07 2008-04-08 Layfield Group Limited Method for manufacturing double-walled liner

Similar Documents

Publication Publication Date Title
US3385428A (en) Flexible bag
US3430842A (en) Valved bag
US3415286A (en) Tube-like structure and package made therefrom
US3537636A (en) Reclosable package
US3508701A (en) Gusseted bags
US3269278A (en) Multi-ply pouch manufacturing
US3283672A (en) Bag
US3570751A (en) Tear-open package
US3469769A (en) Interconnected bags having closure flaps and bottom gussets
US3519197A (en) Bag with weakened closure
US2819010A (en) Sealing envelopes
US3687356A (en) Gusseted type bags
US3448915A (en) Tapered bags or sleeves made from plastic material sheeting and joined by tearable perforation lines
US4759742A (en) Process of making T-shirt bags
US6986237B2 (en) Methods of making a gusset style pouch in a reclosable bag
US2188039A (en) Means for sealing bags
US5551208A (en) Method for applying zipper to film at tube on a form-fill-and-seal
US2873566A (en) Merchandise container and method of making a merchandise package therefrom
US4927405A (en) Protective laboratory specimen bag
US3670954A (en) Bag
US5020922A (en) Bone puncture resistant bag
US3394871A (en) Bags
US4696050A (en) Package formed as bag to be carried
US4637063A (en) Reclosable bag with sealed laminated liner and method
US2257823A (en) Method and apparatus for producing containers