EP0203640A1
Expired / Lapsed
EP
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Method for determining the moment that a layer of tacky material present on a cleaning member requires to be rejuvenated, and device for effecting this method
Assignee: Canon Production Printing Netherlands BV
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Filing: 1986-05-01
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Granted: —
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Expires: 2006-05-01
Abstract
Abstract A method for determining the moment that a layer (9) of tacky material, which layer (9) is present on a cleaning member (8) and serves the purpose of removing contaminants, such as paper dust and softened tonermaterial, from a fusing surface (1), has to be rejuvenated. The method comprises measuring the light-reflection of the layer (9) of tacky material, comparing the measured light-reflection with a reference value and rejuvenating the layer of tacky material as soon as the measured light-relection differs a predetermined value from the reference value. Ralates also to a device for effecting said method.
Inventors
- 👤 Joseph Maria Johannes E. Huntjes
- 👤 Henricus Gertrudis Jacobus M. Kockelmans
- 👤 Jozef Jan Antonius Pleyers
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 20:12
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2017; G03G15/2025; G03G2215/00; G03G2215/16; G03G2215/1647; G03G2215/1657; G03G2215/1676; G03G2215/1695
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
83 words
A method for determining the moment that a layer (9) of tacky material present on a cleaning member (8) and serving the purpose of removing contaminants, such as paper dust and softened toner material, from a fusing surface (1), requires to be rejuvenated, characterized in that the light reflection of the layer (9) of tacky material is determined and the moment that the layer requires rejuvenation is determined on the basis of a comparison of the measured light reflection with a reference value.
Claim 2
Independent Claim
83 words
A method for determining the moment that a layer (9) of tacky material present on a cleaning member (8) and serving the purpose of removing contaminants, such as paper dust and softened toner material, from a fusing surface (1), requires to be rejuvenated, characterized in that the light reflection of the layer (9) of tacky material is determined and the moment that the layer requires rejuvenation is determined on the basis of a comparison of the measured light reflection with a reference value.
Claim 3
Dependent Claim
40 words
A method according to claim 1, characterized in that in the determination of the light reflection is effected by means of a fixed number of measurements at different areas of the surface of the layer - (9) of tacky material.
Claim 4
Dependent Claim
56 words
A method according to claim 1 or 2, characterized in that the light reflection of the previous determination is used as reference value and in that the moment of rejuvenation is required is found if the difference between the measured light reflection and the reference value is smaller than or equal to a predetermined fixed value.
Claim 5
Dependent Claim
60 words
A method according to claim 1 or 2, characterized in that the light reflection of a fresh layer (9) of tacky material is used as reference value and in that the moment that rejuvenation is required is found if the difference between the measured light reflection and the reference value is equal to or greater than a predetermined fixed value.
Claim 6
Independent Claim
144 words
A device for cleaning a surface (1) that has been put into contact with softened thermoplastic material, such as toner material, said device comprising a cleaning member (8) contacting the surface - (1) to be cleaned and being covered with a tacky material layer (9) removing contaminants from the surface (1) to be cleaned, and rejuvenators - (10,11,12) for applying a fresh tacky material layer (9) onto the cleaning member (8), characterized in that means (13,14,19,20,21,22,23) are provided for measuring the light reflection of the tacky material layer (9) present on the cleaning member (8), and in that a comparison device (24) is provided which compares the measured light reflection with a reference value and which emits a signal to put the rejuvenators (10,11,12) in operation, as soon as the difference between the measured value and the reference value is in a predetermined range.
Claim 7
Independent Claim
144 words
A device for cleaning a surface (1) that has been put into contact with softened thermoplastic material, such as toner material, said device comprising a cleaning member (8) contacting the surface - (1) to be cleaned and being covered with a tacky material layer (9) removing contaminants from the surface (1) to be cleaned, and rejuvenators - (10,11,12) for applying a fresh tacky material layer (9) onto the cleaning member (8), characterized in that means (13,14,19,20,21,22,23) are provided for measuring the light reflection of the tacky material layer (9) present on the cleaning member (8), and in that a comparison device (24) is provided which compares the measured light reflection with a reference value and which emits a signal to put the rejuvenators (10,11,12) in operation, as soon as the difference between the measured value and the reference value is in a predetermined range.
Claim 8
Dependent Claim
44 words
A device according to claim 5, characterized in that the means for measuring the light reflection comprise a light source (13) connected to a current source (15), and switching means (17) to interrupt the current to the light source (13) between two successive measurements.
References Cited (Backward Citations)
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