US3150262A - Thermographic copying machine - Google Patents

Thermographic copying machine Download PDF

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Publication number
US3150262A
US3150262A US20039A US2003960A US3150262A US 3150262 A US3150262 A US 3150262A US 20039 A US20039 A US 20039A US 2003960 A US2003960 A US 2003960A US 3150262 A US3150262 A US 3150262A
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US
United States
Prior art keywords
roll
copy
composite
lamp assembly
lamp
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US20039A
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English (en)
Inventor
John W Ulseth
Robert A Halberg
John A Gravelle
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Priority to US20039A priority Critical patent/US3150262A/en
Priority to DE19601422505 priority patent/DE1422505A1/de
Priority to DK494460AA priority patent/DK104277C/da
Priority to CH1440460A priority patent/CH413879A/de
Priority to BE598468A priority patent/BE598468A/fr
Priority to CH299165A priority patent/CH432431A/de
Priority to GB11537/61A priority patent/GB980625A/en
Priority to GB15615/64A priority patent/GB980626A/en
Priority to US198388A priority patent/US3247383A/en
Priority to SE6515/62A priority patent/SE304484B/xx
Application granted granted Critical
Publication of US3150262A publication Critical patent/US3150262A/en
Priority to NL6700650A priority patent/NL6700650A/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/10—Construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/10—Mirrors with curved faces
    • 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
    • G03B27/16—Illumination arrangements, e.g. positioning of lamps, positioning of reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Definitions

  • This invention relates to improvements in thermographic copying machines and has particular reference to a low cost machine capable of rapidly and efficiently producing any desired number of reproductions of graphic originals on heat sensitive copy paper.
  • the improved machine is light in weight and readily portable, having physical dimensions approximating those. of a portable typewriter.
  • the low contour of the improved machine makes it particularly suited to desk-top use.
  • compactness is lent to the improved machine by the embodiment therein of a transparent tubular copy roll within which a lamp and reflector assembly is mounted, there being means forpressing a composite of graphic original and copy sheet into intimate contact with the outer surface of the copy roll as the composite passes the area in which the irradiation of the lamp is concentrated by the reflector assembly.
  • the improved machine has variable speed means and is provided with a single control knob which affords selective control of energization of both the lamp and the drive motor as well as selective control of the position of the lamp and reflector assembly and the speed at which the copy roll is driven.
  • the efficiency of the machine is enhanced by the use of a novel reflector construction affording improved reflectance and stability characteristics, as well as by the use of a novel copy roll construction tending to insure Wrinkle free composite orientation during travel through the machine and particularly during irradiation.
  • FIGURE 1 is a plan view showing the improved thermocopying machine with the cover removed, parts being broken away and shown in section;
  • FIGURE 2 is a vertical sectional view of the improved machine taken generally along the line II-II of FIG- URE l;
  • FIGURE 3 is a perspective view showing the coordination of certain of the parts of the improved machine which are under the control of the single control knob;
  • FIGURE 4 is an enlarged vertical sectional View taken through the lamp and reflector assembly of the improved machine.
  • FIGURE 5 is a greatly enlarged fragmentary plan view of the copy roll to show the variation in the diameter of said roll.
  • the form of the improved copying machine selected for illustration therein comprises a rectangular base member and a complemental rectangular removable cover 11 (FIGURE 2).
  • a frame 12 having opposite end walls 13 and 14, a rear wall 15 and apertured front and top walls 16 and 17 respectively.
  • a pressure roller 18 comprising a metal rod or shaft 19 having bonded thereto a thick cylindrical sleeve'Zt) of very soft resilient material, for example very soft rubber.
  • the pressure roll 18 is 2 inches in diameter
  • the copy roll 25 is 1.780 inches in diameter and 0.055 inches in wall thickness.
  • the nip area is inch in width and the pressure contact between the rolls 1S and 25 across the nip varies from 0 to- 9 pounds per square inch, the pressure curve being sinusoidal with the pressure peak at the midpoint of the nip.
  • the rolls 18, 21 and 22 constitute the bearings for the copy roll 25, the latter being prevented from substantial axial movement by suitable thrust bearing members (not shown) engageable therewith and carried by frame end walls 13 and 14.
  • the copy roll 25 is driven in a clockwise direction as viewed in FIGURE 2 by the roller 21 which, in turn, is driven by an endless belt 26 which connects the pulley 24 to the output drive pulley 27 of variable speed drive means comprising a variable speed transmission 28 and a drive motor 29.
  • the variable speed transmission 28 has a frame 28a comprising spaced parallel wall members 3th, 31 and 32. held in assembled relation by rods 33 and 34 fixed thereto.
  • the motor drive shaft 41 extends through the frame wall 30 and carries a gear type pulley 35.
  • a generally u shaped carrier member 36 is formed with a pair of spaced parallel side plate members 37 and 38 and with a transverse connecting plate member 39 having an intermediate plate member 40 stamped therefrom and extending parallel with side plates 37 and 38.
  • the carrier member 36 is bearinged on the Wall members 3% and 31 for pivotal movement about the axis of the motor drive shaft 41.
  • the intermediate plate member 49 is provided with suitable bearing means for supporting a short shaft 42 which carries a gear type pulley 43 on one side of the plate 40 and a shallow slope driving cone 44 on the other side.
  • An internally toothed endless belt 45 connects the motor drive pulley 35 to the pulley 43 to afford a positive driving connection between the motor 29 and the cone 44.
  • Fixed to the side plate 38 of the carrier 36 is a gear quadrant 46 which is in toothed engagement with a longitudinally slidable rack 47 for a purpose to be later described.
  • a shaft 48 is axially slidably mounted in suitable bearings in the frame members 31 and 32 and has fixed to one end thereof an enlarged disc 49 carryinga peripheral facing ring 50 of frictional material.
  • the facing ringSt) of the disc 49 is biased into frictional engagement with the cone 44 by a leaf spring 51 fixed atone end tothe frame member 32 and having its free end engaging the end of the shaft 48 opposite the disc 49.
  • the output pulley 27 is carried by a shaft 52 mounted in suitable bearings carried by frame members 31' and 32, said shaft also carrying a gear 53 which meshes with an elongated gear 54 fixed on the shaft 48, all as shown in FIGURE 1.
  • the speed of the copy roll 25 can be varied infinitely in accordance with the position of the rack 47 intermediate the solid line and dot and dash line extreme positions thereof shown in FIGURE 2.
  • the base member 16 is provided with slidable mounting means for an elongated channel shaped actuating or slide member 55 having fixed thereto a manually engageable control knob 56.
  • a Bowden wire '7 has one end fixed to the rack 47 and extends through a sheath 58 fixed to a bracket 58a (FIGURES 1 and 2) on base member 10, said Bowden wire having its opposite end fixed to the slide member 55 as at the screw 59. It will be observed that the position of the slide 55 and control knob 56 shown in solid lines in FIGURE 1 and shown in dot and dash lines in FIGURE 3 afiords maximum speed of the copy roll because'this position corresponds to the solid line positionsof the parts in FIGURE 2.
  • a normally closed electrical switch 69 is suitably mounted on the base 10 and has a depressable button 61 positioned to be depressed by a cam member 62 formed on the adjacent end of the slide member 55 and forming an extension of the rear flange thereof.
  • the switch 66 is connected in circuit with the motor 2% and with a source of alternating current by means (not shown) which may include a step-up transformer 63.
  • the button 61 of switch 66 is depressed to open the circuit to the motor 29 and prevent energization thereof.
  • the base member It) and frame 12 are provided with means at the front of the machine defining an inlet throat 64 through which a composite of a graphic original and copy sheet (not shown) can be introduced and by which such composite is guided toward the underside of the nip of the pressure roll 18 and copy roll 25.
  • the cover 11 is provided with an outlet throat 65 through which a composite is guided from the nip of rolls 18 and 25.
  • the preferred irradiating means takes the form of a lamp and reflector assembly 66 comprising an elongated tubular lamp 68 disposed substantially axially ofra reflector 67, said assembly 66 extending within the copy roll 25 as shown in FIGURES l and 2.
  • the reflector 67 and lamp 68 of the assembly 66 are fixed relative to each other and,as shown most clearly in FIGURES l and 3, said assembly is supported at its opposite ends by pivotal arms 69 and 70 which are pivoted, respectively on pins 71 and 72 supported in suitablebearings carried by:
  • the assembly 67 is biased toward its operative position shown j in the solid lines in FIGURE 2 and in dot and, dash lines
  • lamp "assembly, 66 permits movement thereof from its operative position closely adjacent the inner surface of the copy roll 25 at the nip area of said roll and roll 18 to a retracted inoperative position substantially centrally of the roll 25 and shown in solid lines in FIGURE 3.
  • Means is provided for actuating the lamp and reflector assembly 66 to its inoperative position against the bias of the spring 73 and 74 whenever the knob 56 is moved to its oif position shown in solid lines in FIGURE 3 and dot and dash lines in FIGURE 1.
  • the actuating means referred to takes the form of a cam member 75 fixed to the slide 55 and having an angled surface'76 positioned to engage the arm 70 below the pin 72. The parts are so arranged that as the slide 55 is moved toward the left as viewed in FIGURES l and 3, the cam surface '76 engages the arm 76 just before the slide reaches its off position. As the slide moves to its off position,
  • a thin-walled copy roll 25 and of a movably mounted lamp and reflector assembly 66 permits the lamp to be positioned close to the composite and also permits rapid cooling of the parts when in shut-01f position, preventing the development of a hot spot in the roll 25 as a result of absorption of 'heat from the assembly 66 such as might occur on shutoff of the machine if the assembly 66 were fixed in its operative position.
  • the occurrence of such a hot spot would prevent proper functioning of the machine so long as the hot spot exists, since a composite would be overheated by contact with 'the hot spot as it passes through the machine.
  • Energization of the lamp 68 is under the control of a normally open switch 77 (FIGURE 1) provided with a rotatable actuating rod 78 extending transversely of the frame 12.
  • a pair of wire bails 7E9 are fixed to the rod 78, as at 86 and 81 respectively, and extend downwardly therefrom across the inlet throat 64 as shown in FIGURE 2. Insertion of a composite into the inlet throat 64 swings the balls 79 rearwardly and upwardly to non-obstructing positions, such bail movement simultaneously actuating the switch 77 to closed position permitting energization of the lamp 68.
  • the switch 77 returns to its normally open position effecting extinguishment of the lamp 68.
  • the lamp and switch 77 are preferably in series circuit with the main switch 60 and the source of electrical energy, so that the lamp can be energized only if the knob 56. is in one of its on positions. It is apparent, therefore, that the single control knob 56 is eifcctive to control energization of the lamp 68 and motor 29 and is additionally effective to control the speed at which the copy roll 25 is driven, as wellas the position of the lamp and reflector assembly 66.
  • the reflector 67 has a relatively narrow openingflZ which concentrates the radiant energy from the lamp 68 along a relatively narrow band of V the nip area of'the rolls 18 and 25.
  • the reflector opening 82' ative position, and the speed with which a composite can be moved through the nip of the rolls 18 and 25 can be selectively varied from 1.25 to 4.5 inches per second depending upon the position of the control knob 56.
  • the reflector 67 is characterized by exceptional reflectivity, i.e. greater than 93 percent reflectance of infrared, excellent heat stability, low cost and light weight.
  • the reflector 67 may be made of a pair of complemental metal shells 67a and 67b, preferably of aluminum which may be formed to the desired shape by suitable machining, extrusion, rolling or other means.
  • the inner surface 83 of the reflector 67 is overlaid with a thin layer 84 of low temperature porcelain enamel.
  • the layer 84 may be applied by spraying the surface 83 with a thin layer of a slip comprising slurry of a low temperature frit, an opacifier, suitable suspending or binding agents and water.
  • the frit preferred for this purpose is a substantially lead free alkali titania silicate glass of the type commercially available under the trade name 3M Brand Aluminum Frit No. 8102.
  • the thickness of the layer of slip is preferably held within'close tolerances at 0.002 inch in thickness.
  • the reflector 67 is then baked at the slips curing temperature, i.e. at 9701000 R, which is below the melting temperature of the aluminum base, and is then allowed to cool.
  • the resulting enamel layer 84 is characterized by an extremely smooth surface with a high gloss.
  • the reflector 67 is then placed in a vapor coating apparatus and a thin film of chromium or nickel containing bonding agent is vapor coated thereon.
  • Suitable bonding agents are elemental chromium and Inconel, an alloy of iron, chromium and nickel.
  • a thin film 85 of gold is then vapor coated onto the surface of the porcelain enamel layer 84 bearing the bonding agent, the amount of gold being preferably just sufficient to provide opacity, although slightly less or slightly more than that required for opacity may be applied. If a bonding agent is not used, the gold layer 85 may be vapor coated directly onto the porcelain enamel layer 84, and a bond therewith can be produced by a second baking operation at a temperature just below the 1000 F. softening temperature of the enamel.
  • the improved reflector 67 is superior to reflectors heretofore known and in particular is superior to reflectors in which the reflective material is electroplated directly onto a metallic base, since in the latter type, surface irregularities in the base are imparted to the reflective layer. In the instant reflector, such irregularities are not imparted to the surface of the enamel layer, which is extremely smooth and glossy.
  • the porcelain enamel layer 84 provides a chemically inert and heat insulating barrier between the metal of the base 67 and the metal of the reflective layer 85 preventing chemical reaction or alloying of these metals which would deleteriously affect the reflective properties of the layer 85. Since the ceramic layer 84 maintains the barrier even at high temperatures, the reflector 67 has high temperature stability heretofore unobtainable. Moreover, the heat insulating qualities of the layer 84 prevents excessive heating of the low temperature alloy base 67.
  • the copy roll 25 preferably has an average profile in axial section which is radially inwardly bowed from its ends toward the central portion thereof.
  • the bow referred to is termed negative bow and it defined in terms of inches of external radius of the central portion of the roll less than the radius of a perfect cylinder having a radius corresponding to that of the ends of the roll inwardly of any terminal bead thereon.
  • the average negative bow is preferably at least 0.00015 inch per inch of length of the roll 25, and 0.001 inch per inch of diameter of said roll.
  • a negative bow of 0.004 inch has been found effective to prevent wrinkling of a composite passing through the machine.
  • thermographic copying machine having means including a roll defining a copy station, means for irradiating a composite of a graphic original and a copy sheet while in contact with said roll, said means comprising a lamp assembly, means mounting said lamp assembly for movement between an operative position closely adjacent a surface of said roll and a retracted position spaced away from said roll surface, drive means for said roll, and actuating means operatively associated with said mounting means and said drive means for actuating said lamp assembly to operative position when operation of said drive means is initiated and to retracted position when operation of said drive means is terminated.
  • thermographic copying machine having means including a roll defining a copy station, means for irradiating a composite of a graphic original and a copy sheet while in contact with said roll, said means comprising a lamp assembly, means mounting said lamp assembly for movement between an operative position closely adjacent a surface of said roll and a retracted position spaced away from said roll surface, drive means for said roll, actuating means operatively associated with said mounting means and said drive means for actuating said lamp assembly to opervative position when operation of said drive means is initiated and to retracted position when operation of said drive means is terminated, and
  • switch means operatively associated with said lamp assembly permitting energization thereof when said assembly is in operative position and preventing ene'rgization thereof when said assembly is in retracted position.
  • thermographic copying machine having means including a roll defining a copy station, means for irradiating a composite of a graphic. original and a copy sheet while in contact with said roll, said means comprising a lamp assembly, and means mounting said lamp assembly for movement between an operative position closely adjacent a surface of said roll and a retracted position spaced away from said roll surface, drive means for said roll, actuating means operatively associated with said mounting means and said drive means for actuating said lamp assembly to operative and retracted positions, and manually operated control means for said drive and mounting means movable between anoff position in which it effects shutoff of said drive means and retraction of said lamp assembly and an on position in which it effects operation of said drive means and movement of said lamp assembly to operative position.
  • a machine according to claim 3 in which there is switch means for said lamp assembly also under the control of said manually operated control means and operable to prevent energization of said lamp assembly when said control means is in off position and to permit energization of said lamp when said control means is in on position.
  • thermographic copying machine comprising means including a tubular cylindrical radiant energy transmissive roll defining a copy station, means for irradiating a composite of a graphic original and a copy sheet while in contact with the outer surface of said roll, said means comprising a lamp assembly extending longitudinally within said roll, means mounting said lamp assembly for movement between an operative position closely adjacentv the inner surface of said roll and a radially inwardly retracted inoperative position, drive means for rotating said roll, and single control means which effects movement of said mounting means to retract said lamp assembly to said inoperative position and which terminates operation of said drive means.
  • thermographiccopying machine comprising means inner surface of said roll and a radially inwardly re- 'tracted lnoperative position, and single control means which effects movement of said'mounting means to retract said lamp assembly to said inoperative position and which terminates operation of said drive means.
  • thermographic copying machine comprising a effecting shutoff of said drive tubular cylindrical radiant energy transmissive roll, means for conveying a composite of a graphic original and a copy sheet to and from a copy station at which said composite is pressed thereby into intimate contact with a narrow axially extending outer surface portion of said roll,
  • thermographic copying machine comprising a tubular cylindrical radiant'energy transmissive glass first roll, drive means for rotating said first roll, a relatively soft resilient second roll parallel withand in deformed.
  • means for irradiating a composite of a graphic original and a copy sheet compressed against said first roll in said nip area comprising a lamp assembly extending longitudinally within said first roll, deflector meansfocusing' the radiation from .said lamp assembly within a narrow region, means mountmg said lamp assembly for movement between an operative position closely adjacent the inner surface of said roll and at which the radiation from said lamp is focused on said nip area and a radially inwardly retracted. inoperative position,-and single control means which effects movement of said mounting means to retract said lamp assembly to said inoperative position and which terminates operation of said drive means.
  • thermographic copying machine comprising a tubular cylindrical radiant energy transmissive glass roll, means for conveying a composite of a graphic original and a copy sheet to and from a copy station at. which said composite is pressed thereby into intimate contact with a narrow axially extending outer surface portion of said roll, means for irradiating said original at said copy station comprising a lamp assembly extending longitudinally within said roll, reflector means positioned with respect to said lamp for focusing the radiation from said lamp assembly along a narrow band, means mount ing said lamp assembly and reflector means for movement relative to said roll between an operative'position closely adjacent the inner surface of said roll and at which the narrow band of radiation is focused on the outer surface portion of said roll and an inoperative position spaced radially inward from the surface of said roll at which the narrow band of radiation is not focused along any portion of said roll, and control means for said drive and mounting means movable between an off position in which it eiiects shutoii of said conveying means and retraction of said lamp assembly
  • thermographic copying machine comprising a copy roll adapted to havea composite of a graphic original and a copy sheet moved therepast in contact with the periphery thereof; said copy roll being generally cylindrical in shape and having an average profile in axial section which is radially inwardly bowed from its ends toward the central portion'thereof, and means for pressing a composite against the periphery of said copy roll as said composite moves therepast, the contour of said copy roll tending to prevent wrinkling of a composite vmoved therepast and in pressure contact therewith under the influence of said pressure applying means.
  • thermographic copying. machine comprising a copy roll adapted to have a composite of a graphic original and a copy sheet moved therepast in contact with the periphery thereof, said copy roll being generally cylindrical in shape and having arr average profile in axial section which is radially inwardly bowed from its ends toward the central portion thereof, the amountof said bow being at least 0.00015 inch per inch of length of said roll and 0.001 inch per inch of diameter of said roll, and means for pressing a composite against the periphery of said copy roll as said composite moves therepast, the contour of said copy roll tending to prevent wrinkling of a composite moved therepast and in pressure contact therewith under the influence of said pressure applying means.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Fixing For Electrophotography (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Rolls And Other Rotary Bodies (AREA)
US20039A 1960-04-05 1960-04-05 Thermographic copying machine Expired - Lifetime US3150262A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US20039A US3150262A (en) 1960-04-05 1960-04-05 Thermographic copying machine
DE19601422505 DE1422505A1 (de) 1960-04-05 1960-11-30 Reflektor und Verfahren zu seiner Herstellung
DK494460AA DK104277C (da) 1960-04-05 1960-12-12 Termokopieringsmaskine.
BE598468A BE598468A (fr) 1960-04-05 1960-12-22 Machine à copier thermographique
CH299165A CH432431A (de) 1960-04-05 1960-12-22 Reflektor und Verfahren zu dessen Herstellung
CH1440460A CH413879A (de) 1960-04-05 1960-12-22 Kopiermaschine
GB11537/61A GB980625A (en) 1960-04-05 1961-03-29 Thermographic copying machine
GB15615/64A GB980626A (en) 1960-04-05 1961-03-29 Reflectors
US198388A US3247383A (en) 1960-04-05 1962-04-13 Infra-red reflector assembly for thermographic copying machine
SE6515/62A SE304484B (enrdf_load_stackoverflow) 1960-04-05 1962-06-12
NL6700650A NL6700650A (enrdf_load_stackoverflow) 1960-04-05 1967-01-16

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20039A US3150262A (en) 1960-04-05 1960-04-05 Thermographic copying machine

Publications (1)

Publication Number Publication Date
US3150262A true US3150262A (en) 1964-09-22

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Application Number Title Priority Date Filing Date
US20039A Expired - Lifetime US3150262A (en) 1960-04-05 1960-04-05 Thermographic copying machine

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US (1) US3150262A (enrdf_load_stackoverflow)
BE (1) BE598468A (enrdf_load_stackoverflow)
CH (2) CH413879A (enrdf_load_stackoverflow)
DE (1) DE1422505A1 (enrdf_load_stackoverflow)
DK (1) DK104277C (enrdf_load_stackoverflow)
GB (2) GB980626A (enrdf_load_stackoverflow)
NL (1) NL6700650A (enrdf_load_stackoverflow)
SE (1) SE304484B (enrdf_load_stackoverflow)

Cited By (6)

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Publication number Priority date Publication date Assignee Title
US3219794A (en) * 1964-12-08 1965-11-23 Viewlex Inc Thermographic dry copying machine
US3227074A (en) * 1963-06-18 1966-01-04 Eastman Kodak Co Rotary copy making device with temperature responsive heating means
US3298297A (en) * 1964-06-10 1967-01-17 Ncr Co Continuous contact printer
US3421816A (en) * 1966-04-06 1969-01-14 Addressograph Multigraph Safety arrangement for copying machine
US3475589A (en) * 1966-05-04 1969-10-28 Bell & Howell Co Thermal exposure device
US3720806A (en) * 1971-06-18 1973-03-13 Horizons Research Inc Optical development apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9352588B1 (en) 2015-04-02 2016-05-31 Ricoh Company, Ltd. Adjustable energy source within a drum dryer of a print system

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US2699402A (en) * 1953-07-28 1955-01-11 Eastman Kodak Co Method for the manufacture of plastic articles having reflecting surfaces thereon
US2733166A (en) * 1956-01-31 Method of internally coating lamp
US2740895A (en) * 1950-08-21 1956-04-03 Minnesota Mining & Mfg Thermoprinting apparatus
US2783697A (en) * 1953-12-28 1957-03-05 American Photocopy Equip Co Photo-copy machine
US2881701A (en) * 1956-10-09 1959-04-14 Durand Auguste Paul Master paper holder for rotary duplicator
US2900889A (en) * 1954-02-12 1959-08-25 Duophoto Corp Photographic printing apparatus
US2916622A (en) * 1956-12-28 1959-12-08 Kalvar Corp Methods and apparatus for copying
US2927210A (en) * 1958-05-21 1960-03-01 Minnesota Mining & Mfg Copying machine
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US2733166A (en) * 1956-01-31 Method of internally coating lamp
US2578413A (en) * 1948-06-03 1951-12-11 Ford Frank Ronald Pressure roller bending device for duplicating machines
US2740895A (en) * 1950-08-21 1956-04-03 Minnesota Mining & Mfg Thermoprinting apparatus
US2699402A (en) * 1953-07-28 1955-01-11 Eastman Kodak Co Method for the manufacture of plastic articles having reflecting surfaces thereon
US2783697A (en) * 1953-12-28 1957-03-05 American Photocopy Equip Co Photo-copy machine
US2900889A (en) * 1954-02-12 1959-08-25 Duophoto Corp Photographic printing apparatus
US2881701A (en) * 1956-10-09 1959-04-14 Durand Auguste Paul Master paper holder for rotary duplicator
US2916622A (en) * 1956-12-28 1959-12-08 Kalvar Corp Methods and apparatus for copying
US2927210A (en) * 1958-05-21 1960-03-01 Minnesota Mining & Mfg Copying machine
US3081699A (en) * 1958-12-22 1963-03-19 Arnold G Gulko Thermal reproduction

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3227074A (en) * 1963-06-18 1966-01-04 Eastman Kodak Co Rotary copy making device with temperature responsive heating means
US3298297A (en) * 1964-06-10 1967-01-17 Ncr Co Continuous contact printer
US3219794A (en) * 1964-12-08 1965-11-23 Viewlex Inc Thermographic dry copying machine
US3421816A (en) * 1966-04-06 1969-01-14 Addressograph Multigraph Safety arrangement for copying machine
US3475589A (en) * 1966-05-04 1969-10-28 Bell & Howell Co Thermal exposure device
US3720806A (en) * 1971-06-18 1973-03-13 Horizons Research Inc Optical development apparatus

Also Published As

Publication number Publication date
DE1422505A1 (de) 1969-02-27
DK104277C (da) 1966-04-25
GB980625A (en) 1965-01-13
SE304484B (enrdf_load_stackoverflow) 1968-09-30
NL6700650A (enrdf_load_stackoverflow) 1967-03-28
CH432431A (de) 1967-03-31
BE598468A (fr) 1961-06-22
GB980626A (en) 1965-01-13
CH413879A (de) 1966-05-31

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