FR2254426A1 - Plastics bags with valves made from continuous sheet - valves are not in line with folds thus ensuring symmetrical reeling - Google Patents

Plastics bags with valves made from continuous sheet - valves are not in line with folds thus ensuring symmetrical reeling

Info

Publication number
FR2254426A1
FR2254426A1 FR7439981A FR7439981A FR2254426A1 FR 2254426 A1 FR2254426 A1 FR 2254426A1 FR 7439981 A FR7439981 A FR 7439981A FR 7439981 A FR7439981 A FR 7439981A FR 2254426 A1 FR2254426 A1 FR 2254426A1
Authority
FR
France
Prior art keywords
tube
valves
sheet
folds
transverse
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.)
Withdrawn
Application number
FR7439981A
Other languages
French (fr)
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of FR2254426A1 publication Critical patent/FR2254426A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
    • B31B70/844—Applying rigid valves, spouts, or filling tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
    • B31B70/85—Applying patches or flexible valve inserts, e.g. applying film-like valves

Landscapes

  • Making Paper Articles (AREA)

Abstract

A method of making plastic bags with lateral folds and valves utilises as starting material a flat plastics sheet to which the valve seats are fitted before the sheet is bent over so that its edges overlap to form a tube; while the sheet is still flat, slits are formed in it near to one edge, the valve seats are then placed over these slits with their outer edges stitched to the outer edge of the fold to be formed in the tube later, and are then welded by a seam situated between the transverse or longitudinal weld of the tube and the opening slit itself. Pref., the tube has transverse lines of perforations between successive transverse seams. The entire train of bags are pref. rolled up while still in the form of a tube. By locating the valves not at the folded joint, the superimposition of extra thickness at this joint, which normally results to a conical or distorted rolled up tube, is avoided. Instead, the tube rolls up to a generally cylindrical shape.
FR7439981A 1973-12-17 1974-12-06 Plastics bags with valves made from continuous sheet - valves are not in line with folds thus ensuring symmetrical reeling Withdrawn FR2254426A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2362613A DE2362613A1 (en) 1973-12-17 1973-12-17 METHOD AND APPARATUS FOR MANUFACTURING PLASTIC SIDE FOLD VALVE CORNERS

Publications (1)

Publication Number Publication Date
FR2254426A1 true FR2254426A1 (en) 1975-07-11

Family

ID=5900973

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7439981A Withdrawn FR2254426A1 (en) 1973-12-17 1974-12-06 Plastics bags with valves made from continuous sheet - valves are not in line with folds thus ensuring symmetrical reeling

Country Status (4)

Country Link
JP (1) JPS5091484A (en)
DE (1) DE2362613A1 (en)
FR (1) FR2254426A1 (en)
IT (1) IT1025592B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002030749A2 (en) * 2000-10-11 2002-04-18 Michael Clements Markham Improvements in or relating to packaging

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2831036C2 (en) * 1978-07-14 1984-11-15 Windmöller & Hölscher, 4540 Lengerich Process for the production of valve sacks provided with cross bottoms
JPH0646670Y2 (en) * 1986-09-20 1994-11-30 大日本印刷株式会社 Equipment for manufacturing containers with a straw hole
FI80427C (en) * 1987-05-26 1990-06-11 Rosenlew Ab Oy W Portable handbag
DE102005005215B3 (en) 2005-02-03 2006-04-06 Schröder-Frerkes, Julius, Dr.-Ing. Window welding-in process for folding box cutouts involves feeding cutouts with foil pieces to conveyor belt and putting them in gap between diverting drum and belt
DE102023110224A1 (en) 2023-04-21 2024-10-24 Haver & Boecker Ohg Application station and method for application

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002030749A2 (en) * 2000-10-11 2002-04-18 Michael Clements Markham Improvements in or relating to packaging
WO2002030749A3 (en) * 2000-10-11 2002-07-04 Michael Clements Markham Improvements in or relating to packaging

Also Published As

Publication number Publication date
JPS5091484A (en) 1975-07-22
DE2362613A1 (en) 1975-06-26
IT1025592B (en) 1978-08-30

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Legal Events

Date Code Title Description
ST Notification of lapse