US3684372A - Copying machine - Google Patents

Copying machine Download PDF

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Publication number
US3684372A
US3684372A US65922A US3684372DA US3684372A US 3684372 A US3684372 A US 3684372A US 65922 A US65922 A US 65922A US 3684372D A US3684372D A US 3684372DA US 3684372 A US3684372 A US 3684372A
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United States
Prior art keywords
plate
housing
exposure
cover
copying
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Expired - Lifetime
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US65922A
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English (en)
Inventor
Walter Limberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lumoprint Zindler KG and Co GmbH
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Lumoprint Zindler KG and Co GmbH
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Filing date
Publication date
Priority claimed from DE19691942931 external-priority patent/DE1942931C3/de
Application filed by Lumoprint Zindler KG and Co GmbH filed Critical Lumoprint Zindler KG and Co GmbH
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/02—Exposure apparatus for contact printing
    • G03B27/14—Details
    • G03B27/30—Details adapted to be combined with processing apparatus
    • G03B27/306—Heat development

Definitions

  • ABSTRACT An improved copying machine for processing light-- desensitizable transfer material and heat sensitive receiving material, comprising an exposure plate with a contact pressure cover, a heating device and a storage and take-up ree1 each for the band shaped transfer material.
  • the effect of the heat of the heating device on the assembly of sheets comprising transfer and receiving material may be reduced or interrupted downstream of the matter to be transferred,
  • a machine for carrying out this method and described in US. Pat. No. 3,318,219 provides the heating device in the form of a surface heater under the exposure mechanism.
  • the transfer material is provided in the form of a continuous band passing over the exposure plate and through the heating device, whilst the original must be applied to one side of the exposure plate until it rests on the same.
  • Contact pressure is then accomplished by means of a contact pressure cover and the exposure takes place.
  • the band of transfer material is transported on until the exposed section is located within the heating device, and simultaneously a sheet of receiving material is applied, whilst the original has previously been detached.
  • the devices comprise a transport arrangement passing over a convex heating plate and having one or several conveyor belts passing over at least two rollers and adapted to be pivoted about a pivot located on the side of an outlet in order gradually to raise the conveyor belt or belts off the heating plate.
  • the side of the outlet is remote from the exposure plate.
  • the contact pressure is simultaneously released and it should be noted that the conveyor arrangement is preferably such that with contact pressure the transfer material coming from the exposure plate is deflected downwardly.
  • a high raising velocity may be accomplished by a more or less strong curvature of the heating plate. Owing to the raising, the trailing edge of the contact zone moves towards the side of the outlet of the apparatus.
  • the conveyor belt or belts are elastic, or the reversing roller remote from the pivot and located in a frame is resiliently mounted in order to tension the belts.
  • the said devices have a heat shield, pivotable about a pivot and curved concentrically to the pivot, and the heating device is a curved heating plate, the curvature of which is also concentric to the pivot, wherein the heat shield is adapted to be moved from the side of the exposure plate over the heating plate and an arrangement of conveyor belts is mounted on the heating device and raisable therefrom, so that the heat shield can be moved between the conveyor arrangement and the heating plate.
  • the heat shield can accurately lirrrit the effects of the heating device of the heating plate.
  • the pivot is coaxial to a hollow shaft forming the core for the take up reel of the transfer material. In this manner, a particularly favorable compact arrangement may be produced.
  • the movable transport device or the heat shield are movable as a function of the passage of the copy sheet, wherein either the lifting off the heating plate or the insertion of the leading edge of the heat shield (as viewed during the screening movement) are controlled in accordance with the trailing edge of the graphic matter to be transferred. In this manner only the surface section of the transfer material carrying an exposed reproduction is aflected by the heat, acting on the layer.
  • the reverse transport of the transfer material is accompanied by a return movement of the heat shield towards the exposure plate.
  • the exposure device is screened in addition to the heating device in the non-operating state and that an excessive heating of the heat shield is avoided.
  • the inside of the heat shield is mirror plated.
  • a blower or fan may be provided for cooling the heat shield in the retracted position. Where a pivotable transport device is used, the same remains preferably in the raised position after the passage of a copy.
  • the contact pressure cover contains a stack holder with a stack of copy sheets adapted to be carried into a guide track as a function of a movement of the cover.
  • the cover for supplying the receiving material the cover has, in fixed relation to its pivot, a drive wheel for a sheet delivery of the stack holder and a wheel driven by the main drive and located in the path of the said drive wheel when the cover is raised, is mounted on the housing so that the drive wheel meshes operationally when the cover is raised. In this manner, receiving material is supplied when the cover is raised.
  • the contact pressure cover rests in the lower position on the exposure plate, i.e., on the original, whether a sheet or a book, and is then raised for withdrawing the original.
  • the housing is provided with a spring abutment for the raised cover which engages the cover just before the drive wheel engages the wheel.
  • This spring abutment provides awarning to the operator and indicates the point up to which the cover can be raised without causing a sheet of copying material to be transported. This transport of copying material is initiated only'by overcoming the force of the spring abutment.
  • the weight of the cover in the raised posi-. tion is practically unimportant so that the operator does not have to overcome an excessive force for depressing the spring abutment.
  • Drive wheel and wheel may be constructed as gears and may have a certain tooth clearance in order to facilitate-the engagement, because the further steps are initiated only if the copying material reaches a certain position.
  • drive wheel and wheel are friction wheels.
  • a continuously driven pair of transport rollers is mounted downstream of the sheet delivery for transporting the copying material after the same leaves the stack. In this manner, accurately defined actuating conditions are achieved even if the rollers are driven only for short periods. This embodiment is preferred because the operator may be instructed to keep the cover in the raised position against the force of the spring abutment, for example, only for 2 seconds.
  • a contact switch is mounted in the path of the receiving material and switches on the drive for the take-up reel of the transfer material for a certain time, after which the storage reel may be actuated for a reverse rotation over a certain path as a function of the standstill of the take-up reel. Also this produces automatic operation in accordance with the movement of the cover, i.e., as a function of the feed-in of the copy material; here the release of the transport for the transfer material as a function of the advance of the copy material is particularly convenient because accurate synchronization may be achieved without retaining the copy material in a certain ready position outside the stack.
  • the pivotable transport arrangement and the heat shield are adapted to be actuated as a function of the operation of the contact switch through a delay element for lifting or for overlapping the heating plate for a certain period, and wherein the movement can be reversed and the heat shield'retumed in conjunction with the reverse rotation of the storage reel.
  • a timing control is possible in this connection only where certain sizes are usedalso for the reproductions.
  • An adaptation is possible by correspondingly varying the time constants of the timing control.
  • a movement of the pivotable transport arrangement can be initiated so as to press on the heating plate after an exposure as a function of the raising movement of the cover; when the contact pressure position has been reached a switch is operated which energizes the circuit for the motor of the transport arrangement to lift the same, wherein this circuit is preferably controlled by the stop switch. Care should be taken that the contact pressure position is reached comparatively quickly. This is possible without difficulties if the feed of the copy material is released mechanically by the movement of the cover. With operation of the contact by the start of the cover movement, a delay may be included for the transport of the receiving material.
  • the invention may also comprise a switching roller control which may comprise cams arranged around the periphery to determine the timing in conjunction with a decentralized electric drive or may actuate linkages or levers of a mechanical control arrangement.
  • a switching roller control which may comprise cams arranged around the periphery to determine the timing in conjunction with a decentralized electric drive or may actuate linkages or levers of a mechanical control arrangement.
  • FIG. 1 is a diagrammatic side elevation of a machine according to the invention in cross-section, showing the functionally necessary parts;
  • FIG. 2 is a cross-section of another embodiment of the invention corresponding to FIG. 1;
  • FIG. 3 is a diagrarnmatical partial view of FIG. 1;
  • FIG. 4 is a diagrammatical side elevation of the withdrawing-roller
  • FIG. 5 is a partial plan view in cross-section of FIG. 4, explaining the drive elements for the cover movement;
  • FIG.'6 is a cross-section along the line VI-Vl in FIG. 5;
  • FIG. 7 is a circuit diagram of an embodiment of an actuating circuit.
  • FIGS. 1 and 2 comprise a housing 1 with an exposure plate 2 arranged on top above a chamber 3 containing exposure light sources 4.
  • a contact pressure cover 5 is hingemounted; this contact cover 5 is shown in both Figures in the raised position.
  • Its base has a resilient contact pressure plate 6, which may be supported by spring means and can adapt itself to an original.
  • the cover is hollow and contains a stack holder with a stack 7 of copy sheets. The stack is mounted on a plate 90 which is hinge-mounted at 91. The other end of the plate is pressed upwardly by a spring 92, thereby pressing the top sheet against abutments 93 provided only at the corners.
  • withdrawing roller 10 pivotable about a swivel arm rests under resilient pressure on the stack, so that the contact pressure is the same irrespective of the inclination of the cover.
  • the pivot axis 8 is mounted on lateral raised plates 63 of the machine, as shown in detail in FIG. 5. These plates are not shown in FIG. 1 for reasons of clarity.
  • a storage reel 11 for a web of transfer material is mounted rotatably about a shaft 94.
  • This reel is connected with drive means, not shown in detail, which can be uncoupled, or may cause after their deactivation a slight braking of the storage reel 11 in the direction opposite to its driven rotation.
  • Thestorage reel is driven in a clockwise direction.
  • the storage reel is associated with a pair of guide rollers, 12, 13, driven by the main drive of the apparatus; these rollers are mounted in the housing and carry the transfer material to the exposure plate 2.
  • roller 14 for the transfer material On the other side of the chamber 3 receiving roller 14 for the transfer material is mounted rotatably about a shaft 95. Also here, drive and coupling means are provided which drive the roller 14 preferably in an an ticlockwise direction and entrain the transfer material. Also in this case the drive means have preferably a slight braking action in the opposite direction when they are switched off.
  • FIG. 1 in which the cover located on the exposure plate 2 is shown at 5 and indicated by broken lines.
  • An upwardly convex curved heating device in the form of a heating plate 17 is mounted substantially above the roller 14; the length of the heating plate 17 is sufficient to affect the material passing the same for a sufficiently long period of time, having regard to its speed.
  • the heating plate 17 is firmly mounted in the housing 1.
  • the arcuate heating plate 17 is associated with a transport device comprising two reversing rollers 18, 19 over which pass one or several conveyor belts 20.
  • the reversing roller 18, located on the outlet side of the machine, has a quill shaft 21 through which it may be rotated by means of a drive motor 22 (FIG. 3).
  • the quill shaft contains a rotary shaft 23 on which is mounted a pivoting arm or frame 24 on the ends of which the reversing roller 19 is mounted, for example, in slots 25 under bias by springs 86 away from the reversing roller 18, so that the conveyor belt 20 are always under tension.
  • the reversing roller 19 can be pivoted by the frame 24 as indicated by the arrow 26 in FIG. 1, thereby lifting the conveyor belts 20 off the heating plate.
  • the shaft 23 may carry a pinion 27 (FIG. 3) which meshes with the gearing of a gear motor 28 or, .as shown in FIG. 1, a lifting mechanism 97 with a rack 29 and a gear drive 30 may act on the end of the pivotable part of the frame.
  • the gear drive has a motor 98 driving via gears 99 a pinion 100 which meshes with the rack 29.
  • rollers 31, 32 which receive the copy material from the withdrawing roller 10.
  • This pair of transport rollers may be preceded by a further pair of transport rollers 34, 35 mounted on the cover in front of the stack holder and behind an inlet guide element 33 and a contact switch 36 is located between the two pairs of transport rollers 4 and is actuated by the leading edge of the copying sheet supplied from the stack 7.
  • the guide and transport roller 12, 13, 31, 32 define with their uniform diameters the transport speed of the materials, including particularly also the transport material because an exclusive control by means of rollers 11 and 14 would require additional control elements in view of their varying diameters, e.g., by circumferential scanning.
  • the web shaped transfer material 37 is supplied from the storage reel 11 over the exposure plate 2 via the pair of transport rollers 31, 32 to the roller 14 in such a manner that it does not affect the contact switch 36.
  • the cover When, as described further below, the cover is raised by means of the handle 38 after an exposure, the copy material is guided from the stack 7 between the transport rollers 34, 35, 31, 32, and causes the contact switch 36 to be actuated.
  • the drive motor for the pairs of rollers 31, 32, and 12, 13 is switched on so that the leading edge of the copying material is applied with the leading edge of the exposed section of the transfer material and the assembly comprising the transfer material and the copy material is carried under the conveyor belts 20 along the heating plate.
  • the trailing edge of the sheet of copy material reaches the reversing roller 19 (FIG.
  • a heating device in the shape of a heating plate 39 is arranged concentrically to the core of the take-up reel 14 constructed as a quill shaft 101.
  • This quill shaft which is mounted in the housing carries a rotary shaft 40 for lateral sectors 41.
  • These sectors carry a heat shield 42 adapted to be moved in the direction of the arrow 43 in a reciprocating manner. This may be carried out for example by means of a pinion mounted adjacent to the quill shaft on the rotary shaft 40 and meshing with a rack drive.
  • the heat shield 42 has a curvature which is also concentric to the shaft 40 but so spaced therefrom that it can be pivoted to cover the outside of the heating plate 39.
  • the outside is provided with an arrangement of threetransport rollers 44, 45, 46, mounted in the housing and supporting conveyor belts 47.
  • the transport roller 45 may be driven in a clockwise direction whilst the rollers 44, 46 are resiliently held in contact by means of springs 48, 49. They can lift off when the heat shield 42 is placed in position between the transport arrangement and the heating plate.
  • the left edge of the heat shield 42 follows the trailing edge of the copy sheet and prevents thereby the heat from affecting unexposed transfer material. In this con struction the heat shield 42 is returned to its starting position during the reverse transport of the transfer material 37, to prevent unnecessary heating.
  • a continuously driven pair of transport rollers 50, 51 is mounted, for example, pivotably on the cover.
  • a guide element 52 located on the cover behind this pair of rollers carries a contact switch 53 adapted to be actuated by the-leading edge of a copy sheet coming from the stack 7 for control purposes.
  • FIGS. 1 and 4 to 6 A particularly simple system for supplying the copy sheet material is shown in FIGS. 1 and 4 to 6 and may also be used for the F IG. 2 arrangement.
  • the withdrawing roller 10 is'connected, e.g., by a belt drive, with a drive wheel 56 mounted on one side in the cover, as indicated in FIG. 1.
  • the housing 1 contains a wheel 57 continuously driven by the main drive and located in the path of the drive wheel 56 moved with the cover 5, so that it engages the drive wheel 56 when the cover is fully raised. This causes the withdrawing roller to be operated when the cover is raised to transport a sheet of copy material from the stack 7.
  • one side of the cover has an abutment with spring 58 which makes contact with an abutment 59 of the cover just before engagement between the wheels 56 and 57 is established; preferably both these wheels are friction wheels.
  • the drive wheel 56 is shown in FIGS. 4 and 5. It is associated with a pulley 60 mounted on the same shaft 102 and connected by a belt 61 with a further pulley 62 mounted on a shaft 54 serving simultaneously as pivot for the swing arms 9.
  • the shafts 102 and 54 are mounted in the cover 5, shown only partly in FIGS. 4 and 5.
  • the stack 7 in the cover 5 is also shown partly in FIG. 5 and carries the withdrawing roller 10.
  • the swing arms 9 are provided with a gearing 103.
  • FIGS. 4 and 5 also show the pivot 8 of the cover on one side thereof. As indicated in FIG. 5 this pivot is only arranged in the zone of side plates 63 on both sides of the housing and projecting therefrom at the top.
  • a cover side wall 64 serves simultaneously as mounting plate for the shaft 102 of the drive wheel 56 and carries an abutment 65 for the spring abutment 66 shown diagrammatically in FIG. 5.
  • the abutment 65 may be located just in front of the pivot 8 of the cover and is inclined to the upper side of the cover and to the pivotableend of the cover, so that it encounters the spring abutment substantially vertically when the cover is raised.
  • the spring abutment may be made adjustable so that the operator may adjust both the timing and the strength of the actuation.
  • the circuit diagram of FIG. 7 has main terminals 71, 72. Behind a main switch 106 there is first a circuit 107 with the main motor 108 of the machine to which are connected through gearings 109 continuously driven components, such as pairs of rollers 34, 35, the disk 57 or the pair of rollers 51, 50.
  • the exposure device 4 is located between the terminals 71, 72 and is adapted to be switched on by a switch 70.
  • Contact switch 53, 36 is connected between the current terminals in series with a delay action relay 73.
  • This relay closes a contact 74 in the drive circuit 75 for the take-up reel 14.
  • This drive unit also actuates other associated drive elements such as the reversing roller 18.
  • the delay of the relay 73 is so dimensioned that this drive 75 stops after the necessary transport path.
  • a contact 76 possibly using the switching movement of the delay action relay 73 but operating as a function of the stopping of the drive 75, closes a circuit for a further delay action relay 77, the switching contact 78 of which actuates the transport device 79 of the storage reel 11 for the timed re-reel-' ing.
  • the operating element for the contact 76 is shown at 110.
  • the switching relationship is such that the transition of the drive 75 from movement to standstill and the opening of the relay contact 74 collaborate to effect the short duration closure of the contact 76 to release the transport device 79 which remains switched on in accordance with the timing element of the relay 77
  • the transport arrangement 18-20, 24 must first-be lowered from the raised position and then again be raised in a certain relation to the working cycle.
  • the transport device 29, 30 (FIG. 1) or 27, 28 (FIG. 3) or a corresponding drive for the shaft 40 (FIG. 2) are provided which must be reversible.
  • the transport mechanism Starting from the position of FIG. 1 in which the transport mechanism is first in the raised position, it may be lowered by raising the cover 5.
  • a switch 80 is provided which is actuated during the lifting of the cover by means of a stop or by acting on its handle 38 so that the switching arms 81, 82 are positioned in such a manner that the transport mechanism is lowered by means of the motor 28 or 98.
  • the switch contacts for this drive are indicated by the letter a.
  • the contact switches 53, 36 are also connected to a circuit comprising a relay 9 85 with delayed energization and de-energization, the contact 84 of which is located in the circuit 104 which also contains the switching arms 81, 82 of the switch 80.
  • a parallel circuit 106 for the switch contact 84; the switch 107 of this circuit is connected by a linkage 108 with the switch 80. Consequently, when, during the raising of the cover the switching arms 81, 82 are moved into the position a, the bypass circuit 106 is closed'making possible the lowering movement of the transport device.
  • the lowest position of the transport device may be fixed by a limit stop 83 in the zone of the transport device 29, 30 or 27, 28.
  • the switching arms 81, 82 are switched to the other transport device and rest on switch contacts b, whilst the circuit 106 is open.
  • the circuit for the transport device is now, i.e., for the raising, controlled only by the relay 85.
  • the timing element of the relay 85 is such that the lifting movement of the transport device starts when the trailing edge of the picture reaches the reversing roller 19. In this manner, the transport device 27, 28, 29, 30 is actuated at the right moment and for the right duration.
  • the transport device 18-20, 24 remains first in the top position. For a new working cycle the cover movement moves the switching arms again into contact with the switch contacts a and closes the circuit 106.
  • the exposure circuit may contain a relay 67 with delayed de-energization, the switch contact 68 of which is connected in series with the circuit. of the contact switches 36, 53.
  • this contact 68 may also be connected in series with the other control circuits with the relay 77 and the transport device'79.
  • An improved copying machine for processing light-desensitizable transfer material and heat sensitive copying material, comprising a housing having a delivery slot for delivering the copy, wherein the improvement comprises an exposure plate on the upper side of the housing on which exposure plate an original may be fitted, a contact pressure cover pivotally mounted on said housing for pressing an original against said exposure plate, a storage reel located within said housing and spaced outwardly from one edge of said exposure plate, a take-up reel located within said housing and spaced outwardly from said exposure plate on the opposite side thereof from said storage reel, said storage reel and take-up reel arranged to receive the transfer material in the form of a conmovably displaceable means situated within said housing adjacent said plate-shaped heating member, said movably displaceable means being arranged for movement relative to said plate-shaped heating member as a function of the passage of the transfer and copying materials over said heating member.
  • the heating member is an upwardly convexly curved heating plate over which the transfer and copying materials are guided and wherein said movably displaceable means comprises a transport arrangement positioned above said heating plate and includes a frame containing two rollers arranged so that they rest on the opposite edges of said heating plate, at least one elastic conveyor belt passes over these two rollers and the frame has at the end remote fromsaid exposure plate a pivot, and drive means for pivoting the frame about the said pivot, thereby lifting the said at least one conveyor belt gradually, starting with the edge of the heating plate facing said exposure plate.
  • the heating member is an upwardly convexly curved heating plate over which the transfer and receiving materials are guided and said movably displaceable means comprising as a moving element a curved heat shield mounted on a shaft located in the housing, wherein the curvature of the heat shield corresponds to that of the heating plate and the shaft is so arranged that the heat shield can .be moved directly above the heating plate, and further comprising a transport arrangement associated with the heating plate and adapted to be elastically lifted thereoff so that the heat shield can be moved between said transport arrangement and said heating plate.
  • a copying machine for processing light-desensitizable transfer material and copyingmaterial with the copying material supplied as sheets, comprising a housing, a developing unit and an exposure unit positioned within said housing, said exposure unit including an exposure plate located on the top of said housing and a contact pressure cover pivotally mounted on the top of said housing and arranged to cover said exposure plate for positioning an original on said exposure plate, a drive for the copying machine for feeding the transfer and copying materials therethrough, wherein the improvement comprises a stack holder containing a stack of copying sheets located within said pressure cover, and withdrawing means within said contact pressure cover in contact with the stack of copying sheets therein for removing sheets individually from the top of the stack, and drive elements arranged in operative engagement with both of said drive for the copying machine and said withdrawing means when said cover is pivoted away from said exposure plate.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Photographic Developing Apparatuses (AREA)
US65922A 1969-08-23 1970-08-21 Copying machine Expired - Lifetime US3684372A (en)

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Application Number Priority Date Filing Date Title
DE19691942931 DE1942931C3 (de) 1969-08-23 Kopiergerät

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US3684372A true US3684372A (en) 1972-08-15

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743779A (en) * 1972-01-27 1973-07-03 Xerox Corp Selective fusing
US3811771A (en) * 1972-12-26 1974-05-21 G Hays Apparatus for exposing and developing photosensitive sheets
US3904875A (en) * 1973-12-27 1975-09-09 Xerox Corp Single radiation ray path for thermographic imaging and transfixing or fusing
US4053225A (en) * 1975-04-17 1977-10-11 Ohno Research & Development Laboratories Co. Portable copier
US4448516A (en) * 1982-07-13 1984-05-15 The Mead Corporation Developer roll
US4734743A (en) * 1987-04-15 1988-03-29 Logetronics, Inc. Light tight slidable transport for transferring light sensitive materials
US4924256A (en) * 1985-07-19 1990-05-08 Konishiroku Photo Industry Co. Ltd. Slit exposure type color image forming apparatus
US5313248A (en) * 1990-05-24 1994-05-17 Seiko Epson Corporation Heat protection of photosensitive elements in image formation apparatus
US6287024B1 (en) * 1998-08-28 2001-09-11 Fuji Photo Film Co., Ltd. Heating unit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2303206A (en) * 1940-02-24 1942-11-24 Charles P Garman Photographic contact printing apparatus
US3195885A (en) * 1963-12-23 1965-07-20 Sr Albert T Rowell Paper transfer arrangement
US3234868A (en) * 1963-12-26 1966-02-15 Minnesota Mining & Mfg Copying apparatus
US3288047A (en) * 1965-03-29 1966-11-29 Lumonrint Zindler K G Apparatus for exposing and developing sensitive sheets
US3313913A (en) * 1961-03-06 1967-04-11 Zindler Lumoprint Kg Electrically heated machine for producing photographic copies

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2303206A (en) * 1940-02-24 1942-11-24 Charles P Garman Photographic contact printing apparatus
US3313913A (en) * 1961-03-06 1967-04-11 Zindler Lumoprint Kg Electrically heated machine for producing photographic copies
US3195885A (en) * 1963-12-23 1965-07-20 Sr Albert T Rowell Paper transfer arrangement
US3234868A (en) * 1963-12-26 1966-02-15 Minnesota Mining & Mfg Copying apparatus
US3288047A (en) * 1965-03-29 1966-11-29 Lumonrint Zindler K G Apparatus for exposing and developing sensitive sheets

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3743779A (en) * 1972-01-27 1973-07-03 Xerox Corp Selective fusing
US3811771A (en) * 1972-12-26 1974-05-21 G Hays Apparatus for exposing and developing photosensitive sheets
US3904875A (en) * 1973-12-27 1975-09-09 Xerox Corp Single radiation ray path for thermographic imaging and transfixing or fusing
US4053225A (en) * 1975-04-17 1977-10-11 Ohno Research & Development Laboratories Co. Portable copier
US4448516A (en) * 1982-07-13 1984-05-15 The Mead Corporation Developer roll
US4924256A (en) * 1985-07-19 1990-05-08 Konishiroku Photo Industry Co. Ltd. Slit exposure type color image forming apparatus
US4734743A (en) * 1987-04-15 1988-03-29 Logetronics, Inc. Light tight slidable transport for transferring light sensitive materials
US5313248A (en) * 1990-05-24 1994-05-17 Seiko Epson Corporation Heat protection of photosensitive elements in image formation apparatus
US6287024B1 (en) * 1998-08-28 2001-09-11 Fuji Photo Film Co., Ltd. Heating unit

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Publication number Publication date
DE1942931B2 (de) 1975-10-23
DE1942931A1 (de) 1971-03-04
FR2057702A5 (xx) 1971-05-21

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