FR2378623A1 - Studded drum for hot perforation of thermoplastic film - to produce holes with thickened, smooth tear resistant borders - Google Patents

Studded drum for hot perforation of thermoplastic film - to produce holes with thickened, smooth tear resistant borders

Info

Publication number
FR2378623A1
FR2378623A1 FR7703090A FR7703090A FR2378623A1 FR 2378623 A1 FR2378623 A1 FR 2378623A1 FR 7703090 A FR7703090 A FR 7703090A FR 7703090 A FR7703090 A FR 7703090A FR 2378623 A1 FR2378623 A1 FR 2378623A1
Authority
FR
France
Prior art keywords
drum
thickened
shroud
thermoplastic film
borders
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
FR7703090A
Other languages
French (fr)
Other versions
FR2378623B3 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7703090A priority Critical patent/FR2378623A1/en
Publication of FR2378623A1 publication Critical patent/FR2378623A1/en
Application granted granted Critical
Publication of FR2378623B3 publication Critical patent/FR2378623B3/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/26—Perforating by non-mechanical means, e.g. by fluid jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/06—Severing by using heat

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

Appts. for continuously perforating thermoplastic film comprises a rotating drum provided with heated studs and partially enclosed by a shroud which controls the film/drum clearance. The shroud is slightly eccentric relative to the drum axis and is evacuated so that the film path makes tangential contact with the stud crowns so as to be softened before being perforated as the shroud/drum clearance progressively reduces. Suitable for producing holes with slightly thickened and smooth fused borders. Produces holes more quickly than hot air jet drills and with higher tear resistance than cold puncture borders.
FR7703090A 1977-01-31 1977-01-31 Studded drum for hot perforation of thermoplastic film - to produce holes with thickened, smooth tear resistant borders Granted FR2378623A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7703090A FR2378623A1 (en) 1977-01-31 1977-01-31 Studded drum for hot perforation of thermoplastic film - to produce holes with thickened, smooth tear resistant borders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7703090A FR2378623A1 (en) 1977-01-31 1977-01-31 Studded drum for hot perforation of thermoplastic film - to produce holes with thickened, smooth tear resistant borders

Publications (2)

Publication Number Publication Date
FR2378623A1 true FR2378623A1 (en) 1978-08-25
FR2378623B3 FR2378623B3 (en) 1979-10-05

Family

ID=9186275

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7703090A Granted FR2378623A1 (en) 1977-01-31 1977-01-31 Studded drum for hot perforation of thermoplastic film - to produce holes with thickened, smooth tear resistant borders

Country Status (1)

Country Link
FR (1) FR2378623A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5213742A (en) * 1990-09-11 1993-05-25 Vitaphore Corporation Method of producing pores of controlled geometry on a thermoplastic polymer
EP0620087A1 (en) * 1993-02-17 1994-10-19 MACHINE-SERVICE NV, naamloze vennootschap Apparatus and method for perforating films

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5213742A (en) * 1990-09-11 1993-05-25 Vitaphore Corporation Method of producing pores of controlled geometry on a thermoplastic polymer
EP0620087A1 (en) * 1993-02-17 1994-10-19 MACHINE-SERVICE NV, naamloze vennootschap Apparatus and method for perforating films
BE1006751A3 (en) * 1993-02-17 1994-11-29 Mach Service N V Naamloze Venn Method for perforating FOIL AND device which applies this method.
US5449482A (en) * 1993-02-17 1995-09-12 Machine-Service Nv, Naamloze Vennootschap Method for perforating foil and device using this method

Also Published As

Publication number Publication date
FR2378623B3 (en) 1979-10-05

Similar Documents

Publication Publication Date Title
US2481602A (en) Method for forming thermoplastic inner soles
FR2378623A1 (en) Studded drum for hot perforation of thermoplastic film - to produce holes with thickened, smooth tear resistant borders
ES461434A1 (en) Method of producing an annular part for use as a diaphragm
JPS53146764A (en) Film forming by inflation
ES473770A1 (en) Process of forming hollow articles of thermo-plastics materials
JPS5573533A (en) Production of formed polystyrene bead foam covered on its surface with cloth skin
JPS6259643B2 (en)
JPS51133808A (en) Method of producing mult iblade fan
CH610239A5 (en) Method and apparatus for producing packaging blanks
BE791319A (en) Welding device - for producing weld lines on thermoplastic is incorporated in roller
JPS56142039A (en) Manufacture of synthetic resin laminated sheet having open work pattern like lace
JPS5569431A (en) Production of foaming synthetic resin sheet
JPS5267459A (en) Flywheel
FR2352755A1 (en) Forming glass fibres using tubular bushings - with independent temp. control provided along the length of the bushing
JPS555165A (en) Production of seamed pipe
FR2218983A1 (en) Perforation of thermoplastic film - by hot air passing through masks each side of the film
JPS53133423A (en) Automatic rhythm apparatus
JPS6219555B2 (en)
JPS5729431A (en) Manufacture of decorative sheet of synthetic resin
JPS57104053A (en) Heating method by balanced rotating convertion of air under reduced pressure
JPS5313930A (en) Thermal head
JPS53106781A (en) Production of solar heat collector
JPS568224A (en) Heat needle roll
JPS5232751A (en) Method of manufacturing puff for make-up
JPS56162611A (en) Forming method of breaking line on synthetic resin sheet

Legal Events

Date Code Title Description
ST Notification of lapse