EP0429303A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Image forming apparatus and roll paper cutting device therefor
Assignee: Kyocera Mita Industrial Co Ltd
•
Filing: 1990-11-21
•
Granted: —
•
Expires: 2010-11-21
Abstract
Abstract An image forming apparatus has a main body (10) to which is attached a device (12) for cutting paper from a roll and discharging the cut paper through an outlet. The cutting device is selectively shiftable to a feed position where the outlet (110) is in register with a sheet inlet (28) on the main body or to a standby position away from the feed position. The invention also provides a roll paper cutting device for transporting and cutting roll paper having detecting means (270) disposed in the path of transport of documents for detecting a document rear end so as to cut the paper with timing based on the time when the rear end is detected. There is also provided a roll paper cutting device adapted to drive transport rollers with predetermined timing based on the time when the paper travel is detected while all the transport rollers rotate idly in a standby state for paper feeding. Finally, a roll paper cutting device is provided for feeding roll paper to the main body of an image forming apparatus by forwarding the leading end of the paper to feed means (22) disposed in said main body in the paper path to the image forming station, and thereafter transporting the paper onwards by the transport means within the main body.
Inventors
- 👤 Hiroshi Kajita
- 👤 Akihiro Kondoh
- 👤 Makoto Sugiura
- 👤 Nobuhiro Nishioka
- 👤 Masahiko City-Plaza-Mikunihonmachi 301 Fukano
- 👤 Eiji Gotoh
- 👤 Satoshi Tanaka
- 👤 Takeshi Matsuo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 14:22
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6517; G03G15/6523; B; B65; B65H; B65H16/00; B65H16/10; B65H16/106; B65H2301/00; B65H2301/10; B65H2301/12; B65H2301/121; B65H2301/40; B65H2301/41; B65H2301/415; B65H2301/4152; B65H2301/41524; G03G2215/00; G03G2215/00362; G03G2215/00443; G03G2215/00451; G03G2215/00455; Y; Y10; Y10S; Y10S83/00; Y10S83/929; Y10S83/949; Y10T; Y10T83/00; Y10T83/444; Y10T83/4458; Y10T83/446; Y10T83/525; Y10T83/54; Y10T83/541; Y10T83/889; Y10T83/896
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
106 words
An image forming apparatus characterized in that the apparatus comprises an image forming apparatus main body having a sheet inlet and adapted to form an image on a sheet inserted from the sheet inlet, and a roll paper cutting device containing roll paper and adapted to cut the roll paper and discharge the cut sheet to the outside from an outlet, the cutting device being so attachable to the apparatus main body as to be selectively in a feed position where the outlet is in register with the sheet inlet or in a standby position where the outlet is out of register with the sheet inlet.
Claim 2
Dependent Claim
106 words
An image forming apparatus characterized in that the apparatus comprises an image forming apparatus main body having a sheet inlet and adapted to form an image on a sheet inserted from the sheet inlet, and a roll paper cutting device containing roll paper and adapted to cut the roll paper and discharge the cut sheet to the outside from an outlet, the cutting device being so attachable to the apparatus main body as to be selectively in a feed position where the outlet is in register with the sheet inlet or in a standby position where the outlet is out of register with the sheet inlet.
Claim 3
Dependent Claim
80 words
An image forming apparatus as defined in claim 1 wherein the apparatus main body is provided with a sheet guide member shiftable between a guide position in which the sheet guide member projects out from the apparatus main body to guide sheets to a sheet stocking portion when the cutting device is in the standby position and a retracted position in which the sheet guide member is retracted from the cutting device when the device is in the feed position.
Claim 4
Dependent Claim
36 words
An image forming apparatus as defined in claim 1 or 2 wherein the rollpaper cutting device is attached to the apparatus main body so as to be shiftable between the feed position and the standby position.
Claim 5
Dependent Claim
85 words
An image forming apparatus as defined in any one of claims 1 to 3 wherein the apparatus main body is provided with a sheet guide member shiftable between a guide position in which the sheet guide member projects out from the apparatus main body to guide sheets to a sheet stocking portion when the cutting device is in the standby position and a retracted position in which the sheet guide member is retracted from the cutting device when the device is in the feed position.
Claim 6
Dependent Claim
45 words
An image forming apparatus as defined in claim 4 wherein the sheet guide member is pivotally movable about its lower end between the retracted position and the guide position, and a holding member sis provided for holding the sheet guide member in the feed position.
Claim 7
Dependent Claim
63 words
An image forming apparatus as defined in claim 4 or 5 wherein the sheet guide member is provided at a position permitting the guide member to be held in the retracted position by the cutting device when the device is in the feed position and permitting the guide member to return to the guide position when the device is in the standby position.
Claim 8
Dependent Claim
76 words
An image forming apparatus. as defined in any one of claims 4 to 6 which is provided with a drive conversion mechanism for converting the shift of the roll cutting device to the shift of the sheet guide member, positioning the sheet guide member in the retracted position when the cutting device is in the feed position and positioning the sheet guide member in the guide position when the cutting device is in the standby position.
Claim 9
Dependent Claim
48 words
A roll paper cutting device attachable to the main body of an image forming apparatus as defined in claim 3, the cutting device comprising drive means for shifting the cutting device itself relative to the apparatus main body when the device is attached to the apparatus main body.
Claim 10
Dependent Claim
41 words
A roll paper cutting device as defined in claim 8 which comprises means for detecting the amount of shift of the device itself, and control means for controlling the operation of the drive means based on the amount of shift detected.
Claim 11
Dependent Claim
84 words
An image forming apparatus as defined in any one of the preceding claims which comprises mode input means for selecting as a paper feed mode a first feed mode wherein paper is fed from the cutting device or a second feed mode wherein paper is fed through the sheet inlet by means other than the cutting device, and means for notifying the operator to shift the cutting device to the standby position when the second feed mode is selected by the mode input means.
Claim 12
Dependent Claim
27 words
An image forming apparatus as defined in claim 10 wherein the second feed mode is a manual insertion mode wherein sheets are inserted from the sheet inlet.
Claim 13
Dependent Claim
47 words
An image forming apparatus as defined in claim 3 which comprises abnormality detecting means for detecting the image forming apparatus becoming abnormal, and means for notifying the operator to shift the cutting device to the standby position upon the abnormality detecting means detecting the apparatus becoming abnormal.
Claim 14
Dependent Claim
146 words
An image forming apparatus as defined in claim 12 wherein the apparatus main body has a sheet container containing sheets and is adapted to form an image selectively on one of the sheet inserted from the sheet inlet and the sheet fed from the sheet container, the cutting device being attached to the apparatus main body and shiftable between the feed position where the outlet of the device is in register with the sheet inlet of the apparatus main body and the standby position wherein the outlet is away from the location of withdrawal of the sheet container, the abnormality detecting means being sheet detecting means for detecting the presence of sheets in the container, the notifying means being adapted to notify the operator to shift the cutting device to the standby position upon the sheet detecting means detecting the absence of sheets in the container.
Claim 15
Dependent Claim
131 words
An image forming apparatus as defined in claim 12 or 13 wherein a portion of the apparatus main body is withdrawable to remedy jams with the main body portion withdrawn, and the cutting device is attached to the apparatus main body and shiftable between the feed position where the outlet of the device is in register with the sheet inlet of the apparatus main body and the standby position wherein the outlet is away from the location of withdrawal of the main body portion, the abnormality detecting means being jam detecting means for detecting a jam occurring in the apparatus main body, the notifying means being adapted to notify the operator to shift the cutting device to the standby position upon the jam detecting means detecting the occurrence of a jam.
Claim 16
Dependent Claim
18 words
An image forming apparatus as defined in claim 3 which comprises drive means for shifting the cutting device.
Claim 17
Dependent Claim
40 words
An image forming apparatus as defined in claim 15 which comprises means for detecting the amount of shift of the cutting device, and control means for controlling the operation of the drive means based on the amount of shift detected.
Claim 18
Dependent Claim
78 words
An image forming apparatus as defined in claim 15 or 16 which comprises mode input means for selecting as a paper feed mode a first feed mode wherein paper is fed from the cutting device or a second feed mode wherein paper is fed through the sheet inlet by means other than the cutting device, and control means for shifting the cutting device to the standby position when the second feed mode is selected by the input means.
Claim 19
Dependent Claim
27 words
An image forming apparatus as defined in claim 17 wherein the second feed mode is a manual insertion mode wherein sheets are inserted from the sheet inlet.
Claim 20
Dependent Claim
49 words
An image forming apparatus as defined in any one of claims 15 to 18 which comprises abnormality detecting means for detecting the image forming apparatus becoming abnormal, and control means for shifting the cutting device to the standby position upon the abnormality detecting means detecting the apparatus becoming abnormal.
Claim 21
Dependent Claim
142 words
An image forming apparatus as defined in claim 19 wherein the apparatus main body has a sheet container containing sheets and is adapted to form an image selectively on one of the sheet inserted from the sheet inlet and the sheet fed from the sheet container, the cutting device being attached to the apparatus main body and shiftable between the feed position where the outlet of the device is in register with the sheet inlet of the apparatus main body and the standby position where the outlet is away from the location of withdrawal of the sheet container, the abnormality detecting means being sheet detecting means for detecting the presence of sheets in the container, the control means being adapted to shift the cutting device to the standby position upon the sheet detecting means detecting the absence of sheets in the container.
Claim 22
Dependent Claim
127 words
An image forming apparatus as defined in claim 19 or 20 wherein a portion of the apparatus rain body is withdrawable to remedy jams with the main body portion withdrawn, and the cutting device is attached to the apparatus main body and shiftable between the feed position where the outlet of the device is in register with the sheet inlet of the apparatus main body and the standby position there the outlet is away from the location of withdrawal of the main body portion, the abnormality detecting means being jam detecting means for detecting a jam occurring in the apparatus main body, the control means being adapted to shift the cutting device to the standby position upon the jam detecting means detecting the occurrence of a jam.
Claim 23
Dependent Claim
42 words
An image forming apparatus as defined in any one of the preceding claims wherein the cutting device is provided with a document discharge tray for receiving documents discharged from the apparatus main body when the cutting device is in the feed position.
Claim 24
Dependent Claim
136 words
A roll paper cutting device attachable to an image forming apparatus main body for forming an image of a document fed to an exposure unit on a sheet and adapted to feed roll paper in a cut state into the apparatus main body, the cutting device being characterized in that the device comprises a main body containing the roll paper, means for transporting the roll paper, a cutter for cutting the roll paper during transport, rear end detecting means connected to the cutting device main body and provided in the path of transport of documents in the image forming apparatus main body for detecting the rear end of the document, and control means for cutting the roll paper with predetermined timing based on the time when the document rear end is detected by the detecting means.
Claim 25
Dependent Claim
136 words
A roll paper cutting device attachable to an image forming apparatus main body for forming an image of a document fed to an exposure unit on a sheet and adapted to feed roll paper in a cut state into the apparatus main body, the cutting device being characterized in that the device comprises a main body containing the roll paper, means for transporting the roll paper, a cutter for cutting the roll paper during transport, rear end detecting means connected to the cutting device main body and provided in the path of transport of documents in the image forming apparatus main body for detecting the rear end of the document, and control means for cutting the roll paper with predetermined timing based on the time when the document rear end is detected by the detecting means.
Claim 26
Dependent Claim
32 words
A roll paper cutting device as defined in claim 23 wherein the rear end detecting means has a mount portion attachable to a document guide on the image forming apparatus main body.
Claim 27
Dependent Claim
63 words
A roll paper cutting device as defined in claim 23 or 24 which has a mount structure for attaching the rear end detecting means to the document guide shiftably between a first position for detecting the document to be guided by the document guide and a second position where the rear end detecting means does not interfere with the document to be inserted.
Claim 28
Dependent Claim
86 words
An image forming apparatus for use with a roll paper cutting device as defined in any one of claims 23 to 25 and as attached to the apparatus, the rear end detecting means being attachable to the appratus at a position which is so determined that the distance from the rear end detecting position to the image forming position in the main body of the apparatus is equal to the distance from the roll paper cutting position in the cutting device to the image forming position.
Claim 29
Dependent Claim
90 words
An image forming apparatus which comprises a roll paper cutting device as defined in any one of claims 23 to 25 and an image forming apparatus main body having a sheet inlet and adapted to form an image on a sheet inserted from the sheet inlet, the cutting device being so attached to the apparatus main body as to be selectively in a feed position where an outlet of the cutting device feeds roll paper into the apparatus main body or in a standby position away from the feed position.
Claim 30
Dependent Claim
125 words
A roll paper cutting device attachable to an image forming apparatus main body and containing roll paper for cutting the roll paper and feeding the cut sheet to the image forming apparatus, the cutting device being characterized in that the device comprises at least one transport roller for transporting the roll paper, drive means for driving the transport roller, drive change means for selectively bringing the transport roller into idle rotation or into a driven state, means for detecting the travel of the roll paper, and control means for drivingly rotating all transport rollers with predetermined timing based on the time when the travel of the roll paper is detected with all the transport rollers in idle rotation in a standby state for paper feeding.
Claim 31
Dependent Claim
125 words
A roll paper cutting device attachable to an image forming apparatus main body and containing roll paper for cutting the roll paper and feeding the cut sheet to the image forming apparatus, the cutting device being characterized in that the device comprises at least one transport roller for transporting the roll paper, drive means for driving the transport roller, drive change means for selectively bringing the transport roller into idle rotation or into a driven state, means for detecting the travel of the roll paper, and control means for drivingly rotating all transport rollers with predetermined timing based on the time when the travel of the roll paper is detected with all the transport rollers in idle rotation in a standby state for paper feeding.
Claim 32
Dependent Claim
27 words
A roll paper cutting device as defined in claim 28 wherein the travel detecting means is a rotation detector for detecting the rotation of the transport roller.
Claim 33
Dependent Claim
31 words
A roll paper cutting device as defined in claim 28 or 29 wherein the control means drivingly rotates all the transport rollers when the travel of the roll paper is detected.
Claim 34
Dependent Claim
48 words
A roll paper cutting device as defined in any one of claims 28 to 30 which comprises means for inputting the speed of transport of the roll paper by the transport roller, the control means being adapted to drive the transport roller based on the transport speed input.
Claim 35
Dependent Claim
130 words
A roll paper cutting device for feeding a cut sheet of roll paper to art image forming apparatus main body having an image forming assembly and transport means provided in a path of transport to the image forming assembly, the cutting device being characterized in that the device comprises transporting means for transporting the roll paper, a cutter for cutting the roll paper, means for detecting the amount of transport of the roll paper, and control means for discontinuing the transport by the transporting means and changing over the transporting means to render the roll paper free to pull out when the amount of transport detected by the detecting means becomes sufficient for the leading end of the roll paper to reach the transport means within the apparatus main body.
Claim 36
Dependent Claim
130 words
A roll paper cutting device for feeding a cut sheet of roll paper to art image forming apparatus main body having an image forming assembly and transport means provided in a path of transport to the image forming assembly, the cutting device being characterized in that the device comprises transporting means for transporting the roll paper, a cutter for cutting the roll paper, means for detecting the amount of transport of the roll paper, and control means for discontinuing the transport by the transporting means and changing over the transporting means to render the roll paper free to pull out when the amount of transport detected by the detecting means becomes sufficient for the leading end of the roll paper to reach the transport means within the apparatus main body.
Claim 37
Dependent Claim
48 words
A roll paper cutting device as defined in claim 32, the device being characterized in that the control means is adapted to control cutting timing so that the roll paper is cut to a predetermined size during the transport of the roll paper to the image forming assembly.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.