GB2198114A - Manufacture of bags - Google Patents

Manufacture of bags Download PDF

Info

Publication number
GB2198114A
GB2198114A GB08628481A GB8628481A GB2198114A GB 2198114 A GB2198114 A GB 2198114A GB 08628481 A GB08628481 A GB 08628481A GB 8628481 A GB8628481 A GB 8628481A GB 2198114 A GB2198114 A GB 2198114A
Authority
GB
United Kingdom
Prior art keywords
tube
bag
sleeve
bag walls
crimping
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.)
Granted
Application number
GB08628481A
Other versions
GB8628481D0 (en
GB2198114B (en
Inventor
Peter Leslie Steer
Graham Emery Steer
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.)
Craig Medical Products Ltd
Original Assignee
Craig Medical Products Ltd
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
Application filed by Craig Medical Products Ltd filed Critical Craig Medical Products Ltd
Priority to GB8628481A priority Critical patent/GB2198114B/en
Publication of GB8628481D0 publication Critical patent/GB8628481D0/en
Priority to ES87310365T priority patent/ES2020281B3/en
Priority to AT87310365T priority patent/ATE59996T1/en
Priority to EP87310365A priority patent/EP0269419B1/en
Priority to DE8787310365T priority patent/DE3767452D1/en
Priority to JP62301383A priority patent/JP2577018B2/en
Priority to CA000553099A priority patent/CA1315140C/en
Publication of GB2198114A publication Critical patent/GB2198114A/en
Priority to US07/215,835 priority patent/US4876788A/en
Priority to US07/374,415 priority patent/US5002623A/en
Application granted granted Critical
Publication of GB2198114B publication Critical patent/GB2198114B/en
Priority to US07/638,227 priority patent/US5226564A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
    • A61J1/05—Containers specially adapted for medical or pharmaceutical purposes for collecting, storing or administering blood, plasma or medical fluids ; Infusion or perfusion containers
    • A61J1/10—Bag-type containers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
    • A61F5/44—Devices worn by the patient for reception of urine, faeces, catamenial or other discharge; Portable urination aids; Colostomy devices
    • A61F5/4404—Details or parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/64—Joining a non-plastics element to a plastics element, e.g. by force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
    • B29C65/68—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined using auxiliary shrinkable elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being circular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • B29C66/53261—Enclosing tubular articles between substantially flat elements
    • B29C66/53262—Enclosing spouts between the walls of bags, e.g. of medical bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/74—Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7234—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer
    • B29C66/72343—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer for liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0065—Permeability to gases
    • B29K2995/0067—Permeability to gases non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0068—Permeability to liquids; Adsorption
    • B29K2995/0069—Permeability to liquids; Adsorption non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7148—Blood bags, medical bags

Abstract

A synthetic plastics bag for containing liquids, e.g. urine, and having a plastics outlet tube 10 is manufactured by a first step of seam welding the tube between two superposed bag walls. In a subsequent step, an encircling sleeve 20 is slid over the tube to a position where it contains within it the portions of the bag walls on either side of the tube. Thirdly this sleeve is compressed onto the tube by a crimping operation conducted with the crimping force applied in a direction radially of the tube but at substantially right angles to the plane in which the bag walls lie. <IMAGE>

Description

MANUFACTURE OF BAGS This invention relates to the manufacture of bags for containing liquids, and to the bags themselves.
Bags such as urostomy bags, urine bags, colostomy bags, etc. are commonly made from two superposed sheets of plastics material welded around their periphery. It is often desired to have an outlet tube from a lower region of the bag. Such tubes are often also plastics material. Problems arise when making weld joints to fix the tube to the two bag walls in a leak-proof manner.
In particular, there frequently exist two leak paths LP at the locations indicated in Figure 2 of the accompanying drawings. This problem is particularly acute with bags for containing urine because urine has a low surface tension and will readily find any leak path. Welding a plastics tube between bag walls is a particularly difficult problem when one is employing multi-film laminate material for each bag wail, some of the layers of the laminate being intended to provide strength and liquid impermeability and one or more other layers of the laminate being particularly directed to providing gas impermeability. As will be understood, with a thin multi-laminate bag wall, joining such a wall to a tube of appreciable wall thickness presents difficulties in delivering a suitable amount of heat both to the thin bag wall film and to the relatively thick tube wall.
According to the present invention, a bag for containing liquids and having an outlet tube is manufactured by a first step of seam welding the tube between two superposed bag walls, and by a subsequent step of sliding an encircling sleeve over the tube to a position where it contains within it the portions of the bag walls on either side of the tube, and, thirdly, compressing the sleeve onto the tube by a crimping operation conducted with the crimping force applied in a direction radially of the tube but at substantially right angles to the plane in which the bag walls lie.
In this method, one can employ a crimpable plastics sleeve, or a crimpable metal sleeve, or a composite sleeve made of both metal and plastics.
The basis of this invention is that the application of crimping force in the direction indicated will cause the bag wall strips on either side of the tube to be compressed under high pressure towards and into the adjacent portion of the tube wall, which reduces the possibility of the leak paths LP being present in the manufactured product.
The invention also provides a bag for containing liquids in which a joint between an outlet tube and superposed portions of the bag walls is encircled by a sleeve crimped thereon in the manner described. In this way, it is possible in most cases to preclude any leak paths.
In another aspect of the invention, a method for manufacturing a bag for containing liquids comprises the steps of seam or tack welding an outlet tube in position between superposed bag walls and, as a second step, crimping a sleeve around parts of the bag walls and the tube, the sleeve being crimped on with sufficient force to close off any leak paths.
The invention will be better understood from the following description of a non-limiting embodiment thereof, given with reference to the accompanying drawings in which: Figure 1 is a perspective view of a bag having an outlet tube attached thereto in a conventional manner; Figure 2 is a cross-section on the line Il-Il of Figure 1 illustrating the two leak paths LP which frequently occur with this (prior art) method despite all efforts to avoid them; Figure 3 illustrates the first step of one example of method according to the present invention, in perspective view; Figure 4 illustrates a later step of the method in which a sleeve is placed in position for crimping; Figure 5 is a perspective view showing a crimped-on sleeve and Figure 6 is a cross-sectional view on the sectional plane VI-VI illustrating the completed bag having a crimped-on sleeve.
Referring to Figures 3-6, in the method according to the invention, the tube 10 is lightly seam welded by the illustrated seam weld between the two superposed bag films 12 and 14. This weld join may be quickly made as it is not necessary that the joint be leak-proof. Its purpose is to hold the parts in position during the next step. A crimpable sleeve 20, e.g. of metal or plastics material, is then placed over the tube and pushed towards the bag (as indicated by arrows 21) so that the sleeve surrounds the parts 12a, 14a of the superposed bag walls and one end of the sleeve lightly abuts the edge 17. Using a conventional crimping tool, and applying the crimping force in a direction substantialy at 900 to the plane of the bag walls, the sleeve is next crimped tightly onto and over the tube and the wall portions 12a, 14a.Because the force is applied in the indicated direction, the material of the sleeve is forced under high pressure towards those regions of the bag wall material adjacent to the leak paths LP and the sleeve when crimped forces this material into tight engagement with the exterior surface of the tube. At the end of crimping the sleeve has taken up a permanent set and tightly holds the bag wall material now squashed out of strip form to close off the leak paths LP.
One advantage of the method particularly disclosed herein is that crimping being a fast operation, high productivity can be obtained without compromising quality.
In the present specification, a reference has been made to applying the crimping force at right angles to the plane of the walls of the bag. The purpose of this is to be sure of compressing the bag wall strips tightly against the tube. Angles other than 90 o could be used, e.g. an angle in the range 75900 would be suitable in many cases, and the invention is considered to include this possibility.

Claims (7)

1. A bag for containing liquids and having an outlet tube is manufactured by a first step of seam welding the tube between two superposed bag walls, and by a subsequent step of sliding an encircling sleeve over the tube to a position where it contains within it the portions of the bag walls on either side of the tube, and, thirdly, compressing the sleeve onto the tube by a crimping operation conducted with the crimping force applied in a direction radially of the tube but at a substantial angle to the plane in which the bag walls lie.
2. A bag for containing liquids in which a joint between an outlet tube and superposed portions of the bag walls is encircled by a sleeve crimped thereon in such a manner as to substantially preclude any leak paths at the junction of the tube and bag walls.
3. A method for manufacturing a bag for containing liquids comprising the step of seam or tack welding an outlet tube in position between superposed bag walls and, as a second step, crimping a sleeve around parts of the bag walls and the tube, the sleeve being crimped on with sufficient force to close off any leak paths at the junction of the tube and bag walls.
4. A method according to claim 1 in which the crimping force is applied at an angle of 75-105 to the said plane.
5. A method according to claim 4 in which the said angle is substantially 900.
6. A method for manufacturing a bag substantially as herein described with reference to and as illustrated in the accompanying drawings.
7. Any novel combination or sub-combination disclosed and/or illustrated herein.
GB8628481A 1986-11-28 1986-11-28 Manufacture of bags Expired - Fee Related GB2198114B (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
GB8628481A GB2198114B (en) 1986-11-28 1986-11-28 Manufacture of bags
AT87310365T ATE59996T1 (en) 1986-11-28 1987-11-24 MANUFACTURE OF BAGS.
ES87310365T ES2020281B3 (en) 1986-11-28 1987-11-24 MANUFACTURE OF BAGS.
EP87310365A EP0269419B1 (en) 1986-11-28 1987-11-24 Manufacture of bags
DE8787310365T DE3767452D1 (en) 1986-11-28 1987-11-24 PRODUCTION OF BAGS.
JP62301383A JP2577018B2 (en) 1986-11-28 1987-11-28 Bag manufacturing method
CA000553099A CA1315140C (en) 1986-11-28 1987-11-30 Manufacture of bags
US07/215,835 US4876788A (en) 1986-11-28 1988-07-06 Method of making a leakproof connection about the outlet tube of a liquid containment bag
US07/374,415 US5002623A (en) 1986-11-28 1989-06-30 Manufacture of bags
US07/638,227 US5226564A (en) 1986-11-28 1991-01-04 Manufacture of bags

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8628481A GB2198114B (en) 1986-11-28 1986-11-28 Manufacture of bags

Publications (3)

Publication Number Publication Date
GB8628481D0 GB8628481D0 (en) 1987-01-07
GB2198114A true GB2198114A (en) 1988-06-08
GB2198114B GB2198114B (en) 1990-10-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB8628481A Expired - Fee Related GB2198114B (en) 1986-11-28 1986-11-28 Manufacture of bags

Country Status (1)

Country Link
GB (1) GB2198114B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4854737A (en) * 1987-01-12 1989-08-08 E. R. Squibb And Sons, Inc. Bags for containing liquids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4854737A (en) * 1987-01-12 1989-08-08 E. R. Squibb And Sons, Inc. Bags for containing liquids

Also Published As

Publication number Publication date
GB8628481D0 (en) 1987-01-07
GB2198114B (en) 1990-10-31

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee