FR2287980A1 - Film tensioning in continuous vacuum forming - using cords in grooves at edges of forming drum - Google Patents
Film tensioning in continuous vacuum forming - using cords in grooves at edges of forming drumInfo
- Publication number
- FR2287980A1 FR2287980A1 FR7531165A FR7531165A FR2287980A1 FR 2287980 A1 FR2287980 A1 FR 2287980A1 FR 7531165 A FR7531165 A FR 7531165A FR 7531165 A FR7531165 A FR 7531165A FR 2287980 A1 FR2287980 A1 FR 2287980A1
- Authority
- FR
- France
- Prior art keywords
- film
- grooves
- edges
- cord
- continuous vacuum
- 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
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/18—Thermoforming apparatus
- B29C51/20—Thermoforming apparatus having movable moulds or mould parts
- B29C51/22—Thermoforming apparatus having movable moulds or mould parts rotatable about an axis
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Advancing Webs (AREA)
Abstract
A film tensioning device for continuous vacuum forming machine stretches the film by a cord running in grooves at the edges of a drum fitted with cavities, the grooves are slightly smaller than (cord diameter + 2 x film thickness), a pressure device presses the cord and film into the groove immediately behind the film feed point. The film does not slip and the cord has a long life.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD181663A DD113716A1 (en) | 1974-10-14 | 1974-10-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2287980A1 true FR2287980A1 (en) | 1976-05-14 |
FR2287980B3 FR2287980B3 (en) | 1979-06-29 |
Family
ID=5497638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7531165A Granted FR2287980A1 (en) | 1974-10-14 | 1975-10-10 | Film tensioning in continuous vacuum forming - using cords in grooves at edges of forming drum |
Country Status (6)
Country | Link |
---|---|
CH (1) | CH589507A5 (en) |
DD (1) | DD113716A1 (en) |
DE (1) | DE2541630C2 (en) |
FR (1) | FR2287980A1 (en) |
NL (1) | NL7511544A (en) |
SE (1) | SE408031B (en) |
-
1974
- 1974-10-14 DD DD181663A patent/DD113716A1/xx unknown
-
1975
- 1975-09-18 DE DE2541630A patent/DE2541630C2/en not_active Expired
- 1975-10-01 NL NL7511544A patent/NL7511544A/en not_active Application Discontinuation
- 1975-10-10 FR FR7531165A patent/FR2287980A1/en active Granted
- 1975-10-10 CH CH1319275A patent/CH589507A5/xx not_active IP Right Cessation
- 1975-10-13 SE SE7511427A patent/SE408031B/en unknown
Also Published As
Publication number | Publication date |
---|---|
CH589507A5 (en) | 1977-07-15 |
DE2541630C2 (en) | 1983-03-17 |
SE7511427L (en) | 1976-04-15 |
DD113716A1 (en) | 1975-06-20 |
NL7511544A (en) | 1976-04-20 |
SE408031B (en) | 1979-05-14 |
DE2541630A1 (en) | 1976-04-22 |
FR2287980B3 (en) | 1979-06-29 |
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