US3820890A - Information storage and retrieval system - Google Patents

Information storage and retrieval system Download PDF

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Publication number
US3820890A
US3820890A US00044273A US4427370A US3820890A US 3820890 A US3820890 A US 3820890A US 00044273 A US00044273 A US 00044273A US 4427370 A US4427370 A US 4427370A US 3820890 A US3820890 A US 3820890A
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United States
Prior art keywords
passage
information storage
retrieval system
microfiche
storage medium
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Expired - Lifetime
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US00044273A
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English (en)
Inventor
M Kuehnle
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AUDAC CORP
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AUDAC CORP
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Publication date
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Priority to US00044273A priority Critical patent/US3820890A/en
Priority to FR7120536A priority patent/FR2096004A5/fr
Priority to GB1927971*[A priority patent/GB1326973A/en
Priority to DE19712128238 priority patent/DE2128238A1/de
Priority to CA115,008A priority patent/CA947362A/en
Priority to NL7107801A priority patent/NL7107801A/xx
Priority to BE768217A priority patent/BE768217A/fr
Application granted granted Critical
Publication of US3820890A publication Critical patent/US3820890A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/26—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the charge pattern is obtained by projection of the entire image, i.e. whole-frame projection

Definitions

  • An information storage and retrieval system includes a housing with a passage through it.
  • a lens system is contained in the passage for projecting an image onto amicrofiche portion positioned in register with the end of the passage.
  • Electrodes are mounted in the passage for producing a corona discharge in the passage which chargesthe microfiche prior to its exposure to the image and toner is introduced into the passage after such exposure to develop the image On the microfiche portion.
  • microfilm systems do offer substantial savings in cost and re quired storage space for the information. However, they are not suitable for small offices because they are rather costly and complicated to operate and maintain.
  • Another approach to the problem involves recording the data in microimage form on either a temporary recording medium or a permanent microfiche. Full-size reproductions of the data are then made by projecting the recorded microimages' onto a photosensitive medium. The reproductions are made via the temporary storage medium when a quick copy of the original data is desired; they are made from the microfiche when the full-size reproductions are to be retrieved from longterm storage.
  • the storage media can be either a photographic microfiche or a xerographic microfiche, depending upon the particular application. A system of this type is fully. disclosed in application Ser. No. 858,375, filed Sept.
  • a further object of the invention is to provide such a system which can be operated by relatively unskilled personnel.
  • Another object of the invention is to provide a fast and efficient information storage and retrieval system using microxerography.
  • Yet another object of the invention is to provide a microxerographic information storage and retrieval system in which data can be stored on and retrieved from a microfiche with a minimum number of operations and operator movements.
  • Another object of the invention is to provide a microxerographic information storage and retrieval system which impresses images on a medium that are relatively clear and distinct.
  • the invention accordingly comprises the several steps and the relation of one or more of such steps with respect. to each of the others, and the apparatus embodying the features of construction, combination of elements and arrangement of parts which are adapted to effect such steps, all as exemplified in the following detailed disclosure,and-the scope of the invention will be indicated in the claims.
  • the present system combines the features of a modern document copier with a xerographic microfilm system. That is, a single, multiple-function unit provides the operator with several optional modes of operation. These include the full-size reproduction of documents and other graphic data, the recording of documents in microimage form, the display of the re-' corded images on a screen and the making of full-size reproductions from the microimages.
  • the system operates in all cases by first recording an image of the document on the unexposed frame of a xerographic microfiche. Later, if the recorded information is to be retrieved from the microfiche, it can be reproduced to full size by projecting the recorded image onto a'copying medium such as electrostatic copy paper, after which the reproduction is developed in the conventional manner. Alternatively, the microimage can be projected full-size onto a viewing screen contained in the same unit.
  • Another object of the invention is to provide an in-- formation storage and retrieval system which is relatively easy and inexpensive to make and maintain.
  • the system is far less complex and has far fewer moving parts than prior systems of this type which perform the various steps involved in the xerography process at different stations as shown, for example, in the aforesaid application Ser. No, 858,375.
  • the images recorded on the microfilm are consistently clear and dis tinct because, when the microfiche is placed initially in the apparatus, it is properly positioned relative to the lens system as well as to the other elements involved in the xerography process. Therefore, defocusing and other problems caused by the shifting around of the microfiche within the apparatus and play between various components of thesystem are kept to a minimum.
  • this feature makes it quite easy to locate a particular frame on the microfiche to which data is to be added or blocked out or to be superimposed on existing data in that particular frame. These procedures are possible here because the xerographic process does not fix the images on the microfiche. Therefore, the microfiche is always receptive to additional data.
  • FIG. 1 is an isometric view with parts broken away of a microxerographic information storage and retrieval system made in-accordance with the present invention
  • FIG. 2 is an isometric view on a larger scale showing a part of the FIG. 1 system in greater detail;
  • FIG. 3 is a sectional view along line 33 of FIG. 2 with some parts shown in elevation;
  • FIG. 4 is a similarview along line 4-4 of FIG. 2.
  • the present system includes a housing which is divided into spaced-apart, generally rectangular upper and lower sections 10a and 10b.
  • a microfiche holding and positioning assembly indicated at 12 is mounted in housing section 10a for vertical and horizontal movement relative to a xerography assembly 14 contained in section 10a behind the microfiche holder.
  • the operator moves assembly 12 by means of a joy stick 16 extending down from section 10a. He controls the operation of the system by four push button switches projecting from the front of housing section 10b. These are identified as follows: a POWER switch 17a, a PROJECT switch 17b, a COPY switch 160 and a PRINT switch 17d.
  • the document 18 to be copied is placed face-up on a glass platen 22 on the top of housing section 10b.
  • the document is then illuminated by means of a lamp 24 whose light is directed downward by a reflector 26 positioned just above the lamp.
  • the image of document 18 is reflected by a mirror 28 toward assembly 14 which then focuses a greatly reduced image of the document 18 onto a frame 32a of a microfiche 32 retained in assembly 12.
  • the xerography assembly 14 then prints-the data from document 18 onto the microfiche frame 32a.
  • a projection lamp assembly 34 having an arm 36 hinged to the front of housing section 10a is swung over assembly 12 so that it is in line with microfiche frame 320 and the lens axis of assembly 14.
  • Light from a lamp 38 in assembly 34 is directed through a collimator 42 and thence through microfiche frame 32a. After passing through assembly 14, this light is reflected by mirror 28 down toward platen 22 where the data on the microfiche frame 32a is brought to a focus.
  • a copying assembly 44 is contained in housing section 10b directly below platen 22. Also, the platen is transparent so that the recorded image from mirror 28 is projected through the platen onto photosensitive paper contained in copying assembly 14.
  • Assembly 14 operates according to well-known principles and need not be described here in detail. It is sufficient to note that, when actuated, it withdraws unexposed paper from a self-contained supply and transports the paper to the proper position beneath platen 22. Then, after exposure, the assembly 44 develops and fixes the image on the paper and ejects the finished copy 45 through a slot 46 at the side of housing section 10b.
  • the operator decides to view the data in any frame on microfiche 32, he can swing the projection lamp assembly over assembly 12 and project an image of that data down toward platen 22 as he would if he were going to make hard copies. However, he does not actuate the copying assembly 44, so that a full-size image of the data at that particular frame is brought to a focus on the white surface directly below platen 22 and it is readily observable to the operator.
  • the mirror 28 can be hinged to housing section 10a so that it can be swung up away from the lens axis of assembly 14. This allows the image on the microfiche 32 to be projected straight through to a ground glass screen 51 at the back of housing 10. The operator can then view screen 50 through a transparent window 51 in the front wall of housing 10 between the two sections 10a and 10b.
  • the microfiche holding and positioning assembly 12 allows the operator to properly position a microfiche 32 mounted therein so that any selected frame thereof can located properly relative to lens axis A of assembly 14 in order to receive an image.
  • Assembly 12 comprises a pair of parallel, spaced-apart upper and lower tracks 52 and 54 whose ends are connected to the sides of housing section a (FIG. 1).
  • Track 52 is a channel with its sides facing downward, while track 54 is rectangular in cross-section with a flat, horizontal surface facing track 52.
  • a generally rectangular carriage shown generally at 56 is positioned between tracks 52 and 54 and arranged to slide back and forth along them.
  • a bottom carriage member 56a rides on track 54, while a top carriage member 56b rides with a loose fit in the channel of upper track 52.
  • Carriage member 56a also has a horizontal passage 58 through it for loosely receiving a shaft 62 connected at its opposite ends to the sides of housing section 10a. This is to enable the carriage 56 to pivot somewhat about shaft 62 toward and away from assembly 14 for reasons to be described later indetail.
  • carriage 56 carries a generally rectangular plate-like microfiche holder 64 which is mounted for vertical sliding movement. More particularly, holder 64 has a pair of vertical passages 66 and 68 at its opposite sides for slidably receiving a pair of rods 72 and 74 connected at their opposite ends to the upper and lower carriage members 56b and 56a.
  • a generally rectangular opening 76 with a beveled wall 82 is formed in holder 64. This opening is shaped to receive a microfiche, and it may be closed by a swing-down transparent glass door 84 which is hinged to the bottom portion of wall 82.
  • a microfiche 32 is placed in opening 76 where its edges seat against a thin strip 85 (FIGS. 3 and 4) secured to the rear of holder 64 and overhanging opening 76. Then door 84 is swung closed. A handle 86 on the door can be slid up so that a blade 86a attached to the handle engages in a registering slot 88 .(FIG. 3) in the top portion of wall 82.
  • joy stick 16 has an upper threaded end 16a which is screwed into an ear 92 projecting from holder 64.
  • the operator can shift holder 64 and the microfiche 32 therein vertically or horizontally relative to the lens axis A of assembly 14 so that any one of the microfiche frames, e.g., frame 32a, can be centered on the lens axis A.
  • a springloaded pin 94 is installed in the bottom carriage member 56a.
  • Pin 94 is arranged to engage in one of a row of depressions 96 in the top of track 54.
  • the number of recesses 96 corresponds to the number of frame columns across microfiche 32 and the location of the depressions is such that the pin 96 engages in one of them when each microfiche frame is centered on the lens axis A.
  • a spring-loaded pin 93 is mounted in the left-hand carriage member 56c. This pin is arranged to engage in one of a row of depressions 102 in the left-hand side of holder 64.
  • the number of depressions 102 corresponds to the number of frame rows down the microfiche 32.
  • the spacing between them is such that pin 98 engages in one of the microfiche when a micorfiche frame is centered on lens axis A.
  • microfiche 32 has 23 co]- umns and seven rows of frames.
  • the positioning assembly 56 is adjusted so that pin 94 is engaged in the middle depression 96 and pin 98 is engaged in the middle depression 102, then the holder is located so that the frame 32a at the middle of the microfiche is centered on the lens axis A as shown.
  • the operator can easily center any frame in microfiche 32 on the lens axis so that data can be recorded in that frame or so that data already in that frame can be projected for the purposes of making hard copy or for display.
  • numbered scale markings 1103a and 1031 can be applied to the shaft of joy stick l6 and to the front of housing section 110a, respectively, as shown in FIG. I, to facilitate locating a particular frame.
  • the-xerography assembly 14 includes a rectangular housing 110 which is positioned in housing section 10a behind the positioning'assembly 56.
  • a generally cylindrical passage lll2' whose axis coincides with axis A extends all the way through housing llllll.
  • the cross section of the front end lll2b of passage I12 is approximately the same size and shapeas a single microfiche frame.
  • the rear end portion of passage 112 is counterbored at llll2a to receive a lens system 114 whose axis constitutes lens axis A.
  • the mirror 23 is spaced back from housing llll0on axis A.
  • the image of document 18 (FIG. l) is reflected a focus on the frame of microfiche 32 which is in register with passage I12.
  • the image on the microfiche frame is projected through the lens system 1114 and reflected by mirror 28 down toward platen 22.
  • Assembly 14 is constructed to facilitate centering the selected microfiche frame on lens axis A and then to bring to bear all of the elements necessary to impress a xerographic image on the selected microfiche frame. More particularly, when microfiche 32 is placed in holder 64 and the door 84 is closed as shown in solid lines in FIG. 3, the microfiche is brought flush against the front wall 110a of housing lllltl, except where the microfiche is in register with the passage front end 1112b.
  • the front housing wall 16a has a groove 116 extending all around the perimeter of passage 112, and a gasket M6 is seated in this groove.
  • the microfiche 32 is slidable relative to gasket 118 so that the operator can move the microfiche vertically or horizontally in order to center a particular frame on lens
  • a lamp 122 is positioned in a passage I24 in housing llltl. Lamp 122 projects into a passage 126 which communicates with passage 112 so that when the lamp is lit, passage 112 is illuminated behind the microfiche frame centered on lens axis A.
  • the joy stick 16 FIG. 2
  • the operator can actually sight through the transparent door 84 and see which frame is in position to receive new data or to be projected.
  • the bottom carriage member 56a is'provided with a wide arm 123 which extends rearwardly an appreciable distance from shaft 62 onwhich the member 56a is mounted.
  • a solenoid 1132 is mounted by way of a bracket 1134 to a stationary frame member within housing section Mia (FIG. I). Solenoid 1132 has a rod 132a terminating in a pad 1133 and which is normally retracted as shown in dotted lines in FIG. 3. However, when the solenoid is actuated, rod 132a pushes down against arm 1123 so that the latter member acts as a lever tending to pivot the entire carriage 56 counterclockwise about shaft 62.
  • Solenoid 132 is actuated when the operator presses either the PROJECT button 17b or the PRINT button 17d (FIG. 1).
  • housing 110 contains the elements necessary to impress a xerographic image on the microfiche frame centered on the lens axis A. More particularly, as best seen in FIG. 4, a needle-like electrode 142 carried by an insulating sleeve 144 is positioned in a passage 146 extending obliquely through housing 110. The electrode is positioned so that its nib 142a is situated on lens axis A a short distance behind the passage front end 1121:. The electrode is very thin and it is located off the focal point of lens system 114 so that it does not distort the image projected to or from microfiche 32 to any great extent.
  • a second ring electrode 147 is positioned in housing 110 surrounding nib 142a and coaxial with axis A.
  • the inside diameter of ring 147 is slightly larger than that of passage 112 so that it does not interrupt the optical path.
  • the electrode 147 is mounted by way of an extension 147a passing through an insulating sleeve 149 secured in a horizontal passage 150 in the housing.
  • corona discharge When an electrical potential is applied between electrodes 142 and 147 during the printing process, a corona discharge is developed between those members. This corona discharge applies an electric charge to the microfiche frame centered on the lens axis and also in register with passage end 112b.
  • the front half of housing 110 and particularly its front wall 110a is electrically conductive to serve as a floating electrical ground for the microfiche 32.
  • the lamp 24 (FIG. 1) is briefly illuminated so that the image of the document 18 on platen 22 is projected through the lens system 114 and brought to a focus on the microfiche frame in register with passage 112.
  • the portions of the microfiche frame which are illuminated i.e., those corresponding to'the light areas of the document 18
  • lose their electrical charge while the remaining portions which do not receive light i.e., corresponding to the darkened or printed areas in document 18
  • a latent image of the document in the form of charged areas is impressed on the microfiche frame.
  • the glass door 84 may carry a red filter (not shown) to filter out light of shorter wavelengths which has this effect. Then, when it is desired to project an image, this filter can be slid out of the way before positioning projection lamp 34 in front of the door.
  • a liquid toner is applied to it. More particularly, a tank 152 located in housing section a carries conventional liquid toner. The toner is conducted from the tank by means of a tube 154 containing a solenoid valve 156 and which is connected to an inlet fitting 158 on the top of housing 110. Fitting 158 communicates with a passage 162 which extends down through housing 110 just behind the front wall a thereof. The lower end of passage 162 connects with an outlet fitting 164 which extends from the bottom of the housing for connection with a pipe 166 leading to a waste tank (not shown).
  • valve 156 Each time valve 156 is opened momentarily, a measured supply of toner is fed to passage 162.
  • the rear wall of the passage has a portion 162a which slants downwardly toward the top of the passage end 112b forming a narrow horizontalslit at that point.
  • the liquid toner issuing from the slit is directed toward the top of the microfiche frame so that a continuous sheet of toner washes down the inside face of the frame.
  • This toner is then carried out of the housing by way of outlet pipe 166 and may be thrown away or recirculated as desired.
  • the gasket 118 confines the application of the toner to the microfiche frame which is in register with passage end 112b. This minimizes the likelihood of discolorations or markings being applied inadvertently to adjacent microfiche frames.
  • a retractable, reflective shutter 172 is slidably mounted in a vertical slot174 just in front of lens system 114. Slot 174 intercepts passage 112 so that when shutter 172 is in its closed (i.e., fully up) position, as shown in FIG. 3, it completely blocks off counterbore 112a so that the toner is confined to the front portion of passage 112 adjacent microfiche 32.
  • a tube 192 is connected to housing 110 and communicates with a main passage 194 therein having several branches (not shown) all of which lead to passage 112.
  • Pipe 192 is connected by way of a solenoid valve 196 to a hot air source (not shown).
  • valve 196 is opened momentarily so that hot air is directed into passage 112 and onto the microfiche frame centered in that passage. The hot air quickly evaporates the toner solvent, leaving the toner permanently fused to the frame. This process can be speededup even more by preheating the toner from tank 152 by means of a heater 198 (FIG. 3).
  • the aforesaid sequence of the steps in the printing process is con- In use, the operator can add data to an unexposed frame of the microfiche 32 very easily using the present system. First, he depresses the POWER button 17a (F1G. 1) to activate components of the system such as the timer 199 which controls the printing sequence, the toner heater 198, the sighting lamp 122 and perhaps also some of theelements of the copying assembly 44. He then places the document 18 to be copied on platen 22.
  • the POWER button 17a F1G. 1
  • the door 84 may include a red filter as noted previously, the lamp 122 is bright enough so that he can still see the desired frame outlined in the passage end 112b.
  • the timer energizes solenoid 182 which retracts shutter 172, thereby clearing the optical path between the document 18 on platen 22 and the microfiche 32. Following this, the timer turns on lamp 24 momentarily, thereby exposing the microfiche frame. Then the timer deenergizes solenoid 182 so that shutter 172 closes and seals off the forward end of passage 112.
  • the timer opens solenoid valve 156 briefly, allowing a measured amount of toner to flow through the housing and across the microfiche frame being processed. Then, it opens valve 196, allowing hot air to flow through the housing and across the microfiche frame. This-evaporates the toner solvent so that a permanent image is impressed on the frame. Next, the timer closes valve 156 cutting off the supply of hot air. Following this, the timer deenergizes the camming solenoid 132 and turns on lamp 122 again so that the operator can look through door 81 and actually see the data which has been printed onto the microfiche frame. If the print was applied properly, the operator may then open the door 84 and remove the microfiche for storage.
  • the operator selects the desired frame and depresses the PROJECT button 17b on the front of housing section 10b.
  • This turns off the sighting lamp 122, energizes the camming solenoid 132, energizes solenoid 182 to retract shutter 172 and turns on the projection lamp 38.
  • a full-sized image of the data at the selected microfiche frame is projected onto the white surface below platen 22. (With the alternative construction described above, the image is projected onto screen 51 after mirror 28 is swung off the axis A.)
  • the microfiche Once the microfiche is positioned to impress the data on the selected frame, the microfiche remains in exactly the same position while all of the steps in the xerography process are carried out. As a result, the system is much less complex than prior comparable units of this type. Further, because the microfiche remains stationary during processing, the images impressed thereon are relatively sharp and distinct. Furthermore, since the unit is less complex, it costs less to make and requires less maintenance.
  • the present system is also far easier to operate than others of this type.
  • the operator can actually see the microfiche frame which is of interest so that he can position it quickly for information storage or display purposes. So, because of the systems flexibility and ease of operation, it provides a very powerful information storage and retrieval tool.
  • An information storage and retrieval system comprising A. a lens system having a lens axis,
  • F. means for holding the storage medium and positioning it on the lens axis on the opposite side of the lens from the directing means so that an image of a document on the surface is projected to rise lected location on the storage medium
  • G means for charging the storage medium at the point of exposure of same to said image
  • H means for developing the image on the storage medium while the storage medium remains at the same position relative to the lens axis.
  • said holding and positioning means comprises A. a holder having an opening for receiving the storage medium, and
  • An information storage and retrieval system comprising A. a housing having a passage therethrough,
  • D. means for holding the storage medium so that a portion thereof is in register with an end of the passage
  • F. means for projecting an image through the lens system onto the portion of the storage medium in register with the passage end
  • G means associated with the housing for developing the image on the storage medium portion while that portion is still in register with the passage end.
  • the developing means comprise A. means in the passage for applying an electric charge to the storage medium portion in register with the passage end prior to projecting the image onto that portion, and
  • a toner source communicating with the passage for applying toner to the registering storage medium means comprises a source of hot air communicating with the passage for heating the toner.
  • the holding means comprises A. a receptacle for the medium
  • C. means for holding a xerographic microfiche so that a portion thereof is in register with an end of the passage
  • E. means for projecting an image'onto the microfiche portion so as to create a latent image thereon
  • a second electrode adjacent the passage end and also the first electrode, the electrodes being placed so as to create a corona discharge for charging the microfiche portion without interfering with images projected onto themicrofiche portion.
  • the holding means comprises .A. a receptacle for holding a microfiche adjacent the passage end, and B. a transparent door for closing the receptacle and optical lens system.
  • Reproduction apparatus comprising A. a substantially transparent photoconductivelayer,

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Projection-Type Copiers In General (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
US00044273A 1970-06-08 1970-06-08 Information storage and retrieval system Expired - Lifetime US3820890A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US00044273A US3820890A (en) 1970-06-08 1970-06-08 Information storage and retrieval system
FR7120536A FR2096004A5 (fr) 1970-06-08 1971-06-07
GB1927971*[A GB1326973A (en) 1970-06-08 1971-06-07 Apparatus for information storage and retrieval
DE19712128238 DE2128238A1 (de) 1970-06-08 1971-06-07 System zum Speichern und Wiederauffinden von Informationen
CA115,008A CA947362A (en) 1970-06-08 1971-06-07 Information storage and retrieval system and method of forming a xerographic image on a microfiche
NL7107801A NL7107801A (fr) 1970-06-08 1971-06-07
BE768217A BE768217A (fr) 1970-06-08 1971-06-08 Dispositif d'emmagasinage et de localisation de donnees et procede de formation d'une image xerographique sur une microfiche

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Application Number Priority Date Filing Date Title
US00044273A US3820890A (en) 1970-06-08 1970-06-08 Information storage and retrieval system

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US3820890A true US3820890A (en) 1974-06-28

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US00044273A Expired - Lifetime US3820890A (en) 1970-06-08 1970-06-08 Information storage and retrieval system

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US (1) US3820890A (fr)
BE (1) BE768217A (fr)
CA (1) CA947362A (fr)
DE (1) DE2128238A1 (fr)
FR (1) FR2096004A5 (fr)
GB (1) GB1326973A (fr)
NL (1) NL7107801A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972610A (en) * 1973-04-09 1976-08-03 A. B. Dick/Scott Electrophotographic apparatus for production of plural images on a sheet
FR2339879A1 (fr) * 1976-02-02 1977-08-26 Coulter Information Systems Dispositif pour la visualisation d'images sur un grand ecran
US4068941A (en) * 1975-09-18 1978-01-17 Spence Bate Microfiche records
EP0100643A3 (en) * 1982-07-30 1984-05-23 John D. Plumadore Apparatus for imaging and developing electrophotographic microformats
EP0153422A1 (fr) * 1984-02-09 1985-09-04 Fuji Photo Film Co., Ltd. Dispositif électrophotographique
FR2616928A1 (fr) * 1987-06-22 1988-12-23 Regma Procede pour realiser a partir d'un original une microimage sur une zone choisie d'un substrat electrophotographique et appareil de mise en oeuvre du procede
US4913086A (en) * 1987-12-28 1990-04-03 Fuji Photo Film Co., Ltd. Developing apparatus
EP0386414A1 (fr) * 1989-03-08 1990-09-12 Georg-Ulrich Kempf Dispositif de traitement d'images pour documents de base transparents

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102745459B (zh) * 2012-06-18 2015-07-08 浙江大学 板材交替送料装置

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972610A (en) * 1973-04-09 1976-08-03 A. B. Dick/Scott Electrophotographic apparatus for production of plural images on a sheet
US4082442A (en) * 1973-04-09 1978-04-04 A. B. Dick/Scott Electrophotographic method for production of plural images on a sheet
US4068941A (en) * 1975-09-18 1978-01-17 Spence Bate Microfiche records
FR2339879A1 (fr) * 1976-02-02 1977-08-26 Coulter Information Systems Dispositif pour la visualisation d'images sur un grand ecran
EP0100643A3 (en) * 1982-07-30 1984-05-23 John D. Plumadore Apparatus for imaging and developing electrophotographic microformats
EP0153422A1 (fr) * 1984-02-09 1985-09-04 Fuji Photo Film Co., Ltd. Dispositif électrophotographique
FR2616928A1 (fr) * 1987-06-22 1988-12-23 Regma Procede pour realiser a partir d'un original une microimage sur une zone choisie d'un substrat electrophotographique et appareil de mise en oeuvre du procede
US4913086A (en) * 1987-12-28 1990-04-03 Fuji Photo Film Co., Ltd. Developing apparatus
EP0386414A1 (fr) * 1989-03-08 1990-09-12 Georg-Ulrich Kempf Dispositif de traitement d'images pour documents de base transparents

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Publication number Publication date
FR2096004A5 (fr) 1972-02-11
DE2128238A1 (de) 1971-12-16
BE768217A (fr) 1971-12-08
CA947362A (en) 1974-05-14
NL7107801A (fr) 1971-12-10
GB1326973A (en) 1973-08-15

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