EP0126613A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of an apparatus for measuring dampening water for printing machine
Assignee: Sumitomo Heavy Industries Ltd
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Filing: 1984-05-15
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Granted: —
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Expires: 2004-05-15
Abstract
Abstract In order to effect an optimum control of the rate of supply of dampening water to the surface of a plate carried by a plate cylinder of a printing machine, particularly an offset press, the amount of dampening water on the surface of the plate or the surface of a roller through which the dampening water is supplied to the plate or the surface of an additional roller contacting with the water supplying roller is measured optionally. The measurement is conducted by applying parallel rays of light to the objective surface at a predetermined angle of incidence, and measuring the intensity of the mirror-reflected light reflected by the surface at the same angle as the incident light. By measuring the mirror-reflected light insteadly of diffused light, it becomes possible to enhance the accuracy of the measurement and to widen the range of measurement.
Inventors
- 👤 Kenichi 203-Go Shibakubo-Apt. House Aoki
- 👤 Asaya Ohta
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 20:43
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/55
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
A method of measuring dampening water on a printing machine comprising: applying, at a predetermined angle of incidence, parallel rays of light to the surface of a plate on said printing machine or to the surface of one of rollers of a dampening water supply system through which the dampening water is supplied to the plate surface or to the surface of a separate roller contacting one of said rollers of said water supply system; and measuring the intensity of the mirror-reflected light from said surface.
Claim 2
Independent Claim
86 words
A method of measuring dampening water on a printing machine comprising: applying, at a predetermined angle of incidence, parallel rays of light to the surface of a plate on said printing machine or to the surface of one of rollers of a dampening water supply system through which the dampening water is supplied to the plate surface or to the surface of a separate roller contacting one of said rollers of said water supply system; and measuring the intensity of the mirror-reflected light from said surface.
Claim 3
Dependent Claim
39 words
A method of measuring dampening water according to claim 1, further measuring the intensity of the light diffused by said surface; and detecting the ratio between the intensity of said mirror-reflected surface and the intensity of the diffused light.
Claim 4
Dependent Claim
23 words
A method of measuring dampening water according to claim 1, wherein said incidence angle of said parallel rays of light is about 75°.
Claim 5
Independent Claim
29 words
A method of measuring dampening water according to any one of claims 1, 2 and 3, wherein said parallel rays of light are produced by means of a laser.
Claim 6
Independent Claim
107 words
An apparatus for measuring dampening water on a printing machine comprising: a light applying means for applying, at a predetermined angle of incidence, parallel rays of light to the surface of a plate on said printing manine or to the surface of one of rollers of a water supply system for supplying said dampening water to said plate or to the surface of a separate roller contacting said one of said rollers of said water supply system; and a sensor adapted to receive the mirror-reflected light reflected by said surface at an angle same as said incident angle and to measure the intensity of said mirror-reflected light.
Claim 7
Independent Claim
107 words
An apparatus for measuring dampening water on a printing machine comprising: a light applying means for applying, at a predetermined angle of incidence, parallel rays of light to the surface of a plate on said printing manine or to the surface of one of rollers of a water supply system for supplying said dampening water to said plate or to the surface of a separate roller contacting said one of said rollers of said water supply system; and a sensor adapted to receive the mirror-reflected light reflected by said surface at an angle same as said incident angle and to measure the intensity of said mirror-reflected light.
Claim 8
Dependent Claim
102 words
An apparatus for measuring the dampening water according to claim 5, wherein said sensor includes a first photo-detecting section adapted to receive said mirror-reflected light; a first photo-electric conversion circuit connected to said first photo-detecting section; a second photo-detecting section adapted to receive a diffused light which has been reflected by said surface at an angle different from said incident angle; and a second photo-electric conversion circuit connected to said second photo-detecting section; said apparatus further comprising a division circuit for computing the ratio between the output from said first photo-electric conversion circuit and the output from said second photo-electric conversion circuit.
Claim 9
Dependent Claim
58 words
An apparatus for measuring dampening water according to claim 6, wherein said incident angle of said parallel rays of light is about 75° and said first photo-detecting section receives the light reflected by said surface at the angle of about 75°, while said second photo-detecting section receives the light reflected by said surface at an angle of 0°.
Claim 10
Dependent Claim
24 words
An apparatus for measuring the dampening water according to claim 5, wherein said parallel rays of light are produced by means of a laser.
Claim 11
Independent Claim
38 words
An apparatus for measuring dampening water according to any one of claims 5 to 8, wherein said parallel rays of light are applied to the surface of a plate attached to the plate cylinder of said printing machine.
Claim 12
Dependent Claim
55 words
An appratus for measuring dampening water according to any one of claims 5 to 8, wherein said parallel rays of light are applied to the surface of a separate roller contacting one of rollers of said water supply system, the surface of said roller to which said parallel rays of light are applied being grained.
Claim 13
Dependent Claim
52 words
ll. An apparatus for measuring dampening water according to any one of claims 5 to 8, wherein said parallel rays of light are applied to the surface of one of rollers of said water supply system, the surface of said roller to which said parallel rays of light are applied being grained.
References Cited (Backward Citations)
No citation records indexed.
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