EP0338828A2
Expired / Lapsed
EP
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Pressure developing device
Assignee: Brother Industries Ltd
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Filing: 1989-04-20
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Granted: —
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Expires: 2009-04-20
Abstract
Abstract In a pressure developing device employed in an imaging device such as a duplicating machine, an optical printer etc, a pressure for pressurizing a recording medium is capable of being varied in accordance with the width of the recording medium to be pressurized. A sensor for detecting the width of the recording medium is provided, and the pressure force is varied based upon the detected value.
Inventors
- 👤 Takemi C/O Brother Kogyo Yamamoto
- 👤 Hiroshi C/O Brother Kogyo Kawahara
- 👤 Yumio C/O Brother Kogyo Matsumoto
- 👤 Shigeyuki C/O Brother Kogyo Hayashi
- 👤 Kiyoharu C/O Brother Kogyo Hayakawa
- 👤 Osamu C/O Brother Kogyo Takagi
- 👤 Yuji C/O Brother Kogyo Asano
- 👤 Takao C/Obrother Kogyo Nakazawa
- 👤 Shunichi C/O Brother Kogyo Higashiyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 15:46
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/002; G03F7/0022; G03B; G03B2227/00; G03B2227/32; G03B2227/325
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
148 words
A pressure developing device comprising a pair of pressure rollers (21, 31) adapted, in use, to be brought into and out of contact with each other for pressurizing an exposed recording sheet (37), said sheet having thereon a plurality of photo-sensitive microcapsules each containing at least a component to change the rupture strength of said microcapsules when exposed to light and a developing sheet (38) coated with a developer material to develop a visible image characterized in that the pressure developing device further comprises: detecting means (300) for detecting the width of the developing sheet (38) to be pressurized by said pair of rollers (21, 31); and control means for controlling said pair of rollers (21, 31) to pressurize said recording and developing sheets across a width corresponding to the width detected by said detecting means with a predetermined pressure while pressurizing the remainder with a lower pressure.
Claim 2
Dependent Claim
148 words
A pressure developing device comprising a pair of pressure rollers (21, 31) adapted, in use, to be brought into and out of contact with each other for pressurizing an exposed recording sheet (37), said sheet having thereon a plurality of photo-sensitive microcapsules each containing at least a component to change the rupture strength of said microcapsules when exposed to light and a developing sheet (38) coated with a developer material to develop a visible image characterized in that the pressure developing device further comprises: detecting means (300) for detecting the width of the developing sheet (38) to be pressurized by said pair of rollers (21, 31); and control means for controlling said pair of rollers (21, 31) to pressurize said recording and developing sheets across a width corresponding to the width detected by said detecting means with a predetermined pressure while pressurizing the remainder with a lower pressure.
Claim 3
Dependent Claim
111 words
A pressure developing device comprising a pair of pressure rollers (21, 31) being adapted to be brought into and out of contact with each other for pressurizing an exposed self developing type recording medium to develop a visible image, characterized in that said pressure developing device further comprises: detect means (300) for detecting the width of the recording medium to be pressurized by said pair of rollers (21, 31); and control means for controlling said pair of rollers (21, 31) so as to pressurize said recording sheet across a width corresponding to the width detected by said detect means with a predetermined pressure while pressurizing the remainder with a lower pressure.
Claim 4
Dependent Claim
111 words
A pressure developing device comprising a pair of pressure rollers (21, 31) being adapted to be brought into and out of contact with each other for pressurizing an exposed self developing type recording medium to develop a visible image, characterized in that said pressure developing device further comprises: detect means (300) for detecting the width of the recording medium to be pressurized by said pair of rollers (21, 31); and control means for controlling said pair of rollers (21, 31) so as to pressurize said recording sheet across a width corresponding to the width detected by said detect means with a predetermined pressure while pressurizing the remainder with a lower pressure.
Claim 5
Dependent Claim
57 words
A pressure developing device according to claim 1 or 2 wherein said control means comprises a plurality of backup rollers (204, 206) provided in parallel to at least one of said pair of rollers (21, 31) each of said backup rollers (204, 206) respectively applying pressure to at least one of said pair of rollers (21, 31).
Claim 6
Dependent Claim
30 words
A pressure developing device according to claim 3 wherein said control means further comprises a plurality of elastic springs (209) for respectively applying pressure to each of said backup rollers.
Claim 7
Dependent Claim
27 words
A pressure developing device according to claim 4 wherein said control means further comprises a motor and a gear head for varying the length of said springs.
Claim 8
Dependent Claim
38 words
A pressure developing device according to claim 4 wherein said control means further comprises a plurality of cams (207A-C), said pressure to be applied to said backup rollers being varied in accordance with the diameters of said cams.
Claim 9
Dependent Claim
37 words
A pressure developing device according to claim 6 wherein said plurality of cams (207A-C) comprise a camshaft (207) provided parallel to said backup rollers (21, 31) said camshaft having a plurality of cam portions (207A-C) provided therein.
Claim 10
Dependent Claim
47 words
A pressure developing device according to claim 3 wherein said control means further comprises an oil chamber (243) filled with oil (242) for applying pressure to each of said backup rollers and pistons (244) for transmitting pressure from said oil chamber to each of said backup rollers.
Claim 11
Dependent Claim
33 words
A pressure developing device according to claim 1 wherein said control means further controls said pair of rollers so as to pressurize a desired area of said recording sheet and said developing sheet.
Claim 12
Dependent Claim
20 words
A pressure developing device according to claim 9 wherein said desired area is the exposed area of said recording sheet.
Claim 13
Dependent Claim
119 words
A pressure developing device comprising a pair of pressure rollers (21, 31) being adapted to be brought into and out of contact with each other for pressurizing an exposed self-developing recording medium, or an exposed recording medium and a developing sheet, to develop a visible image, characterised in that said pressure developing device further comprises: detect means (300) for detecting the width of the recording medium, or the developing sheet, to be pressurized by said pair of rollers (21, 31); and control means for controlling the force between said pair of rollers (21, 31) depending on the detected width so as to apply a predetermined pressure to said recording medium, or said developing sheet, irrespective of the width thereof.
Claim 14
Dependent Claim
119 words
A pressure developing device comprising a pair of pressure rollers (21, 31) being adapted to be brought into and out of contact with each other for pressurizing an exposed self-developing recording medium, or an exposed recording medium and a developing sheet, to develop a visible image, characterised in that said pressure developing device further comprises: detect means (300) for detecting the width of the recording medium, or the developing sheet, to be pressurized by said pair of rollers (21, 31); and control means for controlling the force between said pair of rollers (21, 31) depending on the detected width so as to apply a predetermined pressure to said recording medium, or said developing sheet, irrespective of the width thereof.
References Cited (Backward Citations)
No citation records indexed.
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