GB1419281A - Apparatus for forming side folds in tubular plastics web - Google Patents

Apparatus for forming side folds in tubular plastics web

Info

Publication number
GB1419281A
GB1419281A GB4627673A GB4627673A GB1419281A GB 1419281 A GB1419281 A GB 1419281A GB 4627673 A GB4627673 A GB 4627673A GB 4627673 A GB4627673 A GB 4627673A GB 1419281 A GB1419281 A GB 1419281A
Authority
GB
United Kingdom
Prior art keywords
bar
nip
angle
film
folds
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
Application number
GB4627673A
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 GB1419281A publication Critical patent/GB1419281A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/355—Conveyors for extruded articles

Abstract

1419281 Gussetting tubular films WINDMOLLER & HOLSCHER 3 Oct 1973 [3 Oct 1972] 46276/73 Heading B5B Side-folds or gussets are formed in a flattened tubular film by means of the illustrated apparatus. The film passes through the nip 4 of nip rolls 3, 3<SP>1</SP>, is inflated by air and passed through funnel 8 to the nip 16 of a second nip roll pair 15, 15<SP>1</SP>. Gussets are formed in funnel 8 by means of side-folding plates 7 which may be adjustable to give gussets of different depths and widths. Nips 4 and 16 are at an angle to each other as viewed along line 13. This enables the folds in the original flattened web to remain as folds, folded in the same sense. However, this would mean that the film leaves the apparatus in a direction different from that at which it enters so means are provided to return the film to the original direction. These means include a non-rotating bar 21 around which the film passes, adjusting its direction as it does so. A direction-changing roll 19 may be provided so that the film passes around it during passage between nip-rolls and bar, reversing its direction. This roll 19 will be further from the axis 13 than bar 21. Preferably the distance from axis 13 to bar 21 is a quarter of the circumference of the bar. Preferably the bar 21 is aligned to bisect the angle formed by the two nip roll pairs. The angle between the nip rolls may be made adjustable by providing a drive means to move one pair relatively to the other. The drive means illustrated also alters the angle of bar 21, maintaining it at half the angle between the nip roll pairs.
GB4627673A 1972-10-03 1973-10-03 Apparatus for forming side folds in tubular plastics web Expired GB1419281A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2248516A DE2248516C3 (en) 1972-10-03 1972-10-03 Device for inserting gussets in plastic films · hose webs

Publications (1)

Publication Number Publication Date
GB1419281A true GB1419281A (en) 1975-12-31

Family

ID=5858089

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4627673A Expired GB1419281A (en) 1972-10-03 1973-10-03 Apparatus for forming side folds in tubular plastics web

Country Status (4)

Country Link
DE (1) DE2248516C3 (en)
FR (1) FR2201679A5 (en)
GB (1) GB1419281A (en)
IT (1) IT995556B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5431068U (en) * 1977-08-02 1979-03-01
DE3506772C2 (en) * 1984-11-27 1986-09-25 Windmöller & Hölscher, 4540 Lengerich Device for inserting gussets in tubular plastic films
BR8505917A (en) * 1984-11-27 1986-08-19 Windmoeller & Hoelscher DEVICE FOR FORMING LATER FOLDS IN TUBULAR PLASTIC LAMINATES
EP0191114B2 (en) * 1985-01-18 1992-11-19 Alpine Aktiengesellschaft Pull-off device for tubular plastic films
DE8707626U1 (en) * 1987-05-27 1987-08-13 Alpine Ag, 8900 Augsburg, De
DE102012017433A1 (en) 2012-09-04 2014-04-03 Reifenhäuser GmbH & Co. KG Maschinenfabrik Folding sword for a blown film plant and blown film plant with such a folding sword

Also Published As

Publication number Publication date
IT995556B (en) 1975-11-20
DE2248516A1 (en) 1974-04-18
DE2248516B2 (en) 1974-10-03
DE2248516C3 (en) 1975-05-15
FR2201679A5 (en) 1974-04-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19931002