EP0151908A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Orientation line in an endless travelling web
Assignee: Nordiskafilt AB
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Filing: 1984-11-14
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Granted: —
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Expires: 2004-11-14
Abstract
Abstract In a machine cloth (1) is disposed an orientation line (3) which extends in the crosswise direction of the cloth. The configuration of the orientation line (3) is sensed by sensors (4) and is displayed on a screen (6) so that distortions or deviations in the machine cloth (1) becomes visible to the operators who may rapidly take measures to correct the incorrect position of the machine cloth (1).
Inventors
- 👤 Lars Birger Österberg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 09:22
CPC Classifications
D; D21; D21F; D21F9/00; D21F1/00; D21F1/36; D21F1/365
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
85 words
An orientation line which is intended to be used in machine cloths, such as forming fabrics, press felts, dryer cloths and the like, in the papermaking, cellulose and similar industries and which line is disposed across the direction-of travel of the machine cloth, characterized therein that the orientation line (3) consists of a material having characteristics which deviate from the characreristics of the material of the rest of the machine cloth to such an extent as to make it possible to scan the orientation line.
Claim 2
Dependent Claim
85 words
An orientation line which is intended to be used in machine cloths, such as forming fabrics, press felts, dryer cloths and the like, in the papermaking, cellulose and similar industries and which line is disposed across the direction-of travel of the machine cloth, characterized therein that the orientation line (3) consists of a material having characteristics which deviate from the characreristics of the material of the rest of the machine cloth to such an extent as to make it possible to scan the orientation line.
Claim 3
Dependent Claim
37 words
An orientation line as claimed in claim 1, characterized therein that the orientation line (3) is made from an electrically conductive material whereas the rest of the machine cloth (1) is made from an electrically non-conductive material.
Claim 4
Dependent Claim
39 words
An orientation line as claimed in claim 1, characterized therein that the orientation line (3) is made from a light-sensitive material whereas the rest of the machine cloth (1) is made from a material which is insensitive to light.
Claim 5
Dependent Claim
19 words
An orientation line as claimed in claim 2, characterized therein that the electrically conductive material is a thread material.
Claim 6
Dependent Claim
23 words
An orientation line as claimed in claim 2, characterized therein that the electrically conductive material consists of a zone having chosen magnetic properties.
Claim 7
Dependent Claim
40 words
An orientation line as claimed in any one of the preceding claims, characterized therein that the orientation line is divided into two or several crosswise extending units spaced predetermined distances apart in the direction of travel of the machine cloth.
Claim 8
Dependent Claim
91 words
The use of the orientation line as claimed in any one of the preceding claims in a device, wherein the machine cloth travels in an endless path, characterized therein that a number of stationary sensors (4) are disposed exteriorly of the web (1) across the direction of travel of the latter, said sensors arranged, upon the passage of the orientation line (3)-past the sensors, to emit a signal to a computer system (5), said system arranged to measure and register the time differences between signals emitted from the individual sensors (4).
Claim 9
Dependent Claim
32 words
The use of the orientation line as claimed in claim 7, characterized therein that the sensors (4) are inductive transducers arranged to scan an orientation line (3) consisting of a magnetic material.
Claim 10
Dependent Claim
55 words
The use of the orientation line as claimed in claim 7, characterized therein that when the orientation line (3) consists entirely or partially of an electrically conductive material a voltage is applied on said orientation line (3) at least upon passage of the latter past the sensors (4), which voltage is registered by the sensors.
Claim 11
Dependent Claim
33 words
The use of the orientation line as claimed in claim 7, characterized therein that when the orientation line (3) consists entirely or partially of a light-sensitive material the sensors (4) are photoelectric cells.
Claim 12
Dependent Claim
50 words
The use of the orientation line as claimed in claim 7, characterized by a memory which is arranged to register the differences in time between the signals emitted from the individual sensors (4) and to store these signals for comparison of the distortion in the web (1) at different times.
Claim 13
Dependent Claim
32 words
The use of the orientation line as claimed in claim 11, characterized by a display on which the registered time differences between signals emitted from the various sensors (4) is displayed visually.
Claim 14
Dependent Claim
47 words
The use of the orientation line as claimed in claim 12, characterized therein that one of the axes on the display indicates the time differences between the emitted signals and the other axis the positions of the sensors (4) in the transverse direction of the web (1).
Claim 15
Dependent Claim
31 words
The use as claimed in any one of claims 7 to 13, characterized therein that the sensor generates at least two pulses at predetermined time intervals in order to allow registration.
References Cited (Backward Citations)
No citation records indexed.
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