IE39327B1 - Apparatus for the control if the width of a web - Google Patents
Apparatus for the control if the width of a webInfo
- Publication number
- IE39327B1 IE39327B1 IE2335/73A IE233573A IE39327B1 IE 39327 B1 IE39327 B1 IE 39327B1 IE 2335/73 A IE2335/73 A IE 2335/73A IE 233573 A IE233573 A IE 233573A IE 39327 B1 IE39327 B1 IE 39327B1
- Authority
- IE
- Ireland
- Prior art keywords
- web
- width
- photo
- circuit
- cells
- Prior art date
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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92114—Dimensions
- B29C2948/92133—Width or height
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92323—Location or phase of measurement
- B29C2948/92447—Moulded article
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
-
- 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
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
1494507 Automatic control of web width INSTITUTE FOR INDUSTRIAL RESEARCH & STANDARDS 18 Dec 1974 [28 Dec 1973] 54689/77 Heading B5B [Also in Division G3] In a controlled web-handling process, the width of a web is sensed by an array of photoelectric cells connected to a logic circuit. A control device responds to the output of the logic circuit by adjusting a parameter of the process so as to eliminate sensed variations in the width of the web. As shown, a double thickness web 12 of polyethylene film is formed from a blown tube 10 produced by an extruder. The web is fed between roller pairs 16, 17 past two multi-channel photoheads 13, 14 arranged symmetrically across each edge of the web 12. A digital logic circuit 18 receives inputs from the twelve photocells 15 which make up the heads 13, 14, and if more than six of the photo-cells are covered by the web 12, a signal is supplied through a timer 19 to an amplifier 25 which energizes an exhaust valve 27 connected to the extruder so as to decrease the width of the web 12. The timer 19 continues to produce an output as long as an overwidth signal is received from the circuit 18, until a limit time is reached, when its output is inhibited for a further preset time by a timer 20, so as to allow time for web of reduced width to reach the photo-heads 13, 14. A similar correction procedure is carried out by timers 21, 22, amplifier 24 and air pressure valve 26 in response to signals from the circuit 18 indicating that fewer than six of the photo-cells 15 are covered by the web, in order to increase the web width. An alarm device 23 is energized by the circuit 18 if either of the innermost photocells 15b is uncovered or if either of the outermost photo-cells 15a is covered by the web. Corrections may alternatively be effected by adjusting the web speed.
[GB1494507A]
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IE2335/73A IE39327B1 (en) | 1973-12-28 | 1973-12-28 | Apparatus for the control if the width of a web |
GB54689/74A GB1494507A (en) | 1973-12-28 | 1974-12-18 | Apparatus for the control of the width of a web |
IT30840/74A IT1027895B (en) | 1973-12-28 | 1974-12-20 | DEVICE FOR CHECKING THE WIDTH OF A BELT |
DE19742461720 DE2461720A1 (en) | 1973-12-28 | 1974-12-28 | DEVICE FOR CONTROLLING THE WIDTH OF A WEB OF MATERIAL |
FR7443287A FR2256019B1 (en) | 1973-12-28 | 1974-12-30 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IE2335/73A IE39327B1 (en) | 1973-12-28 | 1973-12-28 | Apparatus for the control if the width of a web |
Publications (2)
Publication Number | Publication Date |
---|---|
IE39327L IE39327L (en) | 1975-06-28 |
IE39327B1 true IE39327B1 (en) | 1978-09-13 |
Family
ID=11034204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IE2335/73A IE39327B1 (en) | 1973-12-28 | 1973-12-28 | Apparatus for the control if the width of a web |
Country Status (5)
Country | Link |
---|---|
DE (1) | DE2461720A1 (en) |
FR (1) | FR2256019B1 (en) |
GB (1) | GB1494507A (en) |
IE (1) | IE39327B1 (en) |
IT (1) | IT1027895B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2740629A1 (en) * | 1977-09-09 | 1979-03-15 | Pannenbecker H | FILM BLOWING PROCESS |
FR2502358A1 (en) * | 1981-03-18 | 1982-09-24 | Montage Cie Indle | Liq. level controller for ion exchange resin mfr. - uses circuit to convert video signals from camera to control signals for actuation of inlet and outlet valves |
DE3203452C2 (en) * | 1982-02-02 | 1986-02-13 | Erhardt & Leimer Kg, 8900 Augsburg | Web guiding device |
IT1199385B (en) * | 1984-02-23 | 1988-12-30 | Gd Spa | FEEDING DEVICE FOR TAPES OF WRAPPING MATERIAL TO A CIGARETTE PACKAGING MACHINE OF THE DOUBLE WAY TYPE |
EP0218850A1 (en) * | 1985-09-25 | 1987-04-22 | Kunststoff-Verarbeitungs GmbH Dirk A. Brügmann | Process for determining a proportional change in a profile |
DE3541680A1 (en) * | 1985-11-26 | 1987-05-27 | Bernd Becker | DEVICE FOR CONTROLLING A PLANT FOR PRODUCING STRING PROFILES |
JPH0739128B2 (en) * | 1991-03-29 | 1995-05-01 | 鬼怒川ゴム工業株式会社 | Controller for continuous extrusion vulcanization line |
-
1973
- 1973-12-28 IE IE2335/73A patent/IE39327B1/en unknown
-
1974
- 1974-12-18 GB GB54689/74A patent/GB1494507A/en not_active Expired
- 1974-12-20 IT IT30840/74A patent/IT1027895B/en active
- 1974-12-28 DE DE19742461720 patent/DE2461720A1/en active Pending
- 1974-12-30 FR FR7443287A patent/FR2256019B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2256019B1 (en) | 1978-09-29 |
GB1494507A (en) | 1977-12-07 |
IE39327L (en) | 1975-06-28 |
FR2256019A1 (en) | 1975-07-25 |
DE2461720A1 (en) | 1975-07-10 |
IT1027895B (en) | 1978-12-20 |
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