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 bordersInfo
- 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
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.
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)
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 |
-
1977
- 1977-01-31 FR FR7703090A patent/FR2378623A1/en active Granted
Cited By (4)
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 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |