US3155025A - Auxiliary contact printer unit for photographic printing machine - Google Patents

Auxiliary contact printer unit for photographic printing machine Download PDF

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Publication number
US3155025A
US3155025A US143791A US14379161A US3155025A US 3155025 A US3155025 A US 3155025A US 143791 A US143791 A US 143791A US 14379161 A US14379161 A US 14379161A US 3155025 A US3155025 A US 3155025A
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United States
Prior art keywords
paper
roller
negative
support
casing
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
US143791A
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English (en)
Inventor
Karl J Kallenberg
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.)
Pako Corp
Original Assignee
Pako Corp
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 Pako Corp filed Critical Pako Corp
Priority to US143791A priority Critical patent/US3155025A/en
Priority to DEP30243A priority patent/DE1195601B/de
Priority to AT776262A priority patent/AT242509B/de
Priority to SE10652/62A priority patent/SE315802B/xx
Priority to GB38274/62A priority patent/GB1012687A/en
Application granted granted Critical
Publication of US3155025A publication Critical patent/US3155025A/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
    • 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
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/521—Arrangements for applying a supplementary information onto the sensitive material, e.g. coding
    • 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
    • G03B27/18—Maintaining or producing contact pressure between original and light-sensitive material
    • G03B27/22—Maintaining or producing contact pressure between original and light-sensitive material by stretching over a curved surface

Definitions

  • the invention relates to an improvement in photographic printing equipment and more particularly to a unit which may be used in conjunction with a photographic printer to automatically and sequentially print indicia or the like adjacent an image on a print produced by the printer.
  • the arcuate negative support also allows proper contact between paper and support without the necessity of a pressure plate.
  • FIGURE 1 is a longitudinal and vertical sectional view of the unit with portions thereof broken away and the negative support shown in lowered position in phantom outline.
  • FIGURE 2 is a longitudinal horizontal sectional view with portions thereof being broken away.
  • FIGURE 3 is a rear elevational View of the unit showing in particular the drawing means therefor.
  • FIGURE 4 is a sectional view on the line 44 of FIGURE 1.
  • FIGURE 5 is a sectional view on the line 55 of FIGURE 1.
  • FIGURE 6 is a sectional view taken on the line 6-6 of FIGURE 1.
  • FIGURE 7 is a sectional view taken on the line 7-7 of FIGURE 1.
  • FIGURE 8 is a sectional view on the line 8-8 of FIGURE 2.
  • FIGURE 9 is a top plan view of a negative mask having indicia thereon to be printed adjacent a printed image.
  • FIGURE 10 is a top plan view of a finished print having the image and indicia thereon.
  • the auxiliary printer unit A is mounted on a casing 10 which is part of a photographic printer, B, a portion of which is shown.
  • the casing 10 has an exposure aperture not shown, to which the printing paper 12 is transported for successive intermittent exposures.
  • the paper 12 leaves the roller 14, FIGURE 1, and is positioned over the roller 16 mounted on the shaft 17 connected to the outer free end of the arm 18 pivotally mounted on the pin 20 secured to the rear wall 22 of the casing 10.
  • the arm 18 is normally urged upwardly by the coil spring 19.
  • the arm 23 is provided with graduation marks 27 which aid in positioning of the clamp 21 thereon.
  • the clamp 21 is formed with an indent or recess 29 into which the end of the shaft 17 extends. The position of the shaft 17 and the roller 16 is thus determined by the position of the clamp 21 on the arm 23.
  • the lower end of the arm 23 is pivotally secured at its lower end to the bracket 17' secured to light lock housing 28. From the roller 16 the paper 12 is further positioned between the rollers 24 and 26 of the light lock housing 28 and outwardly therefrom through the aperture 34) formed in the end wall 32 of the casing 10 and the end wall 34 of the unit casing 38, thence to the idler roller 46 mounted on a pair of arms 42 secured to the inner surface of the Wall 34.
  • the unit casing 38 further includes the top wall 44, the end wall 46, the rear wall 48 mounted on the casting 49, front Wall St) and the bottom wall 52 which is formed with the opening 54.
  • the front Wall St) is formed with the access opening 5% formed in the front wall 5% and covered by the lock equipped access door 60.
  • first friction tendency drive 62 which is mounted on the shaft 64 extending within the casing 38 journaled in the bearing 66 integral with the casting 49.
  • the shaft 64 has secured thereto the collar 68 positioned upon the shaft 64 and against the collar 63 is the oiled cork ring 70.
  • the drive roller 72 including the outer rubber sleeve portion 74, and the body portion 76 mounted on the bearing 7%.
  • the thrust bearing 86 Positioned on the shaft 64 and against the drive roller 72 of the drive 62 is the thrust bearing 86 which is urged against the body portion 76 by means of the coil spring 82 positioned between the bearing and the collar 84 fixed to the shaft 64.
  • the pulley 8'5 which is driven in the manner hereinafter described.
  • the drive roller 72 is rotated due to the pressure contact of the cork ring 70 against the collar 68.
  • the drive roller 72 which is in contact with the paper, thereby stops and there is slippage at point Z between the face of the cork ring 70 and the face of the collar 68 with the shaft 64 continuing to rotate.
  • the roller advances the paper which is described more in detail hereinafter.
  • the numeral 88 designates a second friction tendency drive which includes the shaft 91; rotatably mounted in the bearing 92 connected to the casting 4%.
  • the drive also includes the collar 94 secured to the front or outer end of the shaft and in addition the roller 96 formed with the centrally disposed internal hub portion 98 mounted on the bearings and M2 on the shaft 99.
  • Also positioned on the shaft 90 is areaoas the thrust bearing 164 which is urged against the end of the hub portion 98 by the coil spring 166.
  • Positioned on the shaft 9%) is the oiled cork ring ltltl which abuts the hub portion 98 and the same is positioned against the collar ma fixed to the shaft 919.
  • the drive roller 96 of the second friction tendency drive 88 has positioned thereon the rubber driving sleeve 12% which engages the paper 12.
  • the diameter of the sleeve 120 is smaller than the outside diameter of the rubber sleeve 74 of the drive 62 for the reason given hereinafter.
  • the take-up roller 122 mounted on the arm 12 lpivotally connected to the shaft 126 which is mounted on the casting 49 and which extends into the upper part of the casing 33.
  • the roller 12.2 is normally urged upwardly by means of the spring 128 secured to the arm 124 and the screw connected to the casting 49.
  • the paper is positioned under the drive roller 88 and upwardly over the take-up roller 122 and from the roller 122 downwardly to and through the light lock hous ing 130 and thence through the aperture 132 formed in the wall 46, the magazine mounting plate 13 and the end wall 136 of the magazine 1355 in which is mounted the paper take-up spool 140.
  • the spool 14% is mounted on the shaft 141.
  • the paper 12 also passes through the light lock housing 142 mounted on the inside of the end wall 136 of the magazine 138 and from the housing upwardly over the idler roller 143 mounted in the magazine 13% and onto the spool 140.
  • the numeral 144- designates a shaft mounted on the boss 146 formed on the outer upper end of the casting 49, FIGURES 2, 3 and 4, and secured to the outer end of the shaft 144 is the friction clutch 14-8.
  • Secured to the inner end of the shaft 144 is the pulley 150, FIGURES 2 and 3.
  • a pulley 152 is mounted on the shaft 154 which is mounted in the boss 156 of the casting 49, FIGURE 3.
  • a belt 153 is positioned on the pulleys 1511 and 152.
  • the friction clutch 148 is driven by the belt 160 which is positioned on the driven three groove pulley 114.
  • the pulley 162 FIGURE 3, which engages the belt 158 when the magazine 1138 is locked in the position shown particularly in FIGURE 3, and as a result the spool 140 of the magazine is driven.
  • the outer portion 164 of the clutch 148 is always rotating and when there is a slack in the paper fed by the rollers 62 and 88 the friction drive 148 becomes operable thereby rotating shaft 144, and as a result the pulley 162 through belt 153 is rotated, thereby rotating spool Mill and taking up the paper thereon.
  • the shaft 9@ which drives the lower friction tendency drive 88 has mounted thereon the pulley 166 and positioned thereon is the belt 168 which passes over the pulley 86 to thereby drive the upper friction tendency drive 62.
  • the belt 168 bears upon the idler pulleys 176 and 172 mounted on the casting 49.
  • the letter E designates a lamp housing which mounts the curved negative support 173 hereinafter described and includes the base plate 174 having formed on each of the longitudinal edges thereof the depending flanges 1'76 and v 178 which mount the pair of trunnions 180 and 182, re-
  • the side walls 184 and 186 are connected to the lead end wall 138 and the trailing end wall 1%.
  • the upper edges 192 and 194 of the side walls 184 and 186, respectively, are arcuate and support thereon the curved negative support 1'73 which is in the form of a section of a cylinder.
  • the negative support 1'73 is transparent and may be made of a clear acrylic plastic.
  • the negative support 173 is secured in position by inserting the lip portion 1% thereof under the transverse lip Zlltl of the leading wall 188 and the lower end of the same is positioned adjacent the flange 2% which is part of the trailing wall 1%.
  • the screws 2% are provided and extended through the flange 262 and are secured in the negative holder 173.
  • bracket 216 mounted on one side of the outward surface of the negative holder 1'73 .
  • the negative C is secured in position by the tape strips 2% attached to the negative C and over the end of the support 173.
  • bracket 216 Pivotally secured to the side wall 184 of the lamp housing E at 185 is the bracket 216 and pivotally secured to the side wall 186 at 187 is a similar companion bracket 212.
  • Mounted on the brackets 210 and 212 is the shaft 214 which mounts the leading pressure roller 216 equipped with the rubber sleeve 21$.
  • brackets 210 and 212 Connected to the lower ends of the brackets 210 and 212 is the transverse bar 220 to which is secured to the coil spring 222.
  • the spring 222 is also secured to the bracket 224 secured to the leading end wall 188 thereby normally urging the pressure roller 216 upwardly against the drive roller '72.
  • the numeral 226 designates a bracket pivotally connected at 228 to the wall 184%. Further provided is a similar bracket 236D pivotally connected at 232 to the side Wall 186.
  • the brackets 226 and 236 are connected by the transverse bar 232 similar to bar 2211', and the coil spring 234 connects the bar 232 and the bracket 236 secured to the trailing wall 1% thereby normally urging the pressure roller 238 upwardly, said roller being mounted on the shaft 240 connected at its ends to the brackets 226 and 23h.
  • the roller 238 is thus held in pressure engagement with the second friction tendency drive 88 when the lamp housing E is in the position shown in FIGURE 1.
  • the exposure lamp 24-2 FIGURES 1 and 8, which is mounted in the timer housing 244 and which extends partially up into the lamp housing E through the opening 24-6 formed in the base plate 174'.
  • the filament of the bulb 24-2 is positioned substantially radially from the negative support 1733 thereby providing uniform light distribution over the entire surface of the negative support 173 mounting the negative C.
  • the flange 25h has formed at one end and on the inward surface thereof the slot 25 which is formed with the angularly disposed enlarged mouth entrance portion 236.
  • the flange 252 has formed on the inner surface thereof the slot 258 identical to the slot 254 and also has an enlarged entrance portion (not shown) similar to the entrance portion 256.
  • the slots 254 and 258 receive the trunnions 1% and 182, respectively of the flanges 176 and 137 of the lamp housing E to removably position the housing E within the casing 38 as hereinafter described.
  • the base plate 174 of the lamp housing E has formed therein the lip 262, FiG- URES 1 and 8, spaced from the plate 174 which engages upon the bottom 52 adjacent the edge of the aperture 54 when the housing E is in operative position within the casing portion 38 in the manner hereafter described. Further provided is the locking catch 264, the ring 266 of which engages the hook 26$ secured to the underside of the base 174 of the housing E when the housing E is in operative position within the casing 38.
  • the lamp housing E is mounted within the casing in the following manner: With the housing E removed from the casing 38 the paper 12 is drawn through and from the aperture 30 of the printer B, FIGURE 1, placed under roller 41), under the second friction tendency drive 88, as shown in broken lines, indicated as P, FIG- URE 1, upwardly over the take-up roller 122 and then downwardly through the light lock housing 130. The paper is further fed through the aperture 132, through the light lock housing 142 of the take-up magazine 138, upwardly over the idler roller 143 and thence onto the takeup spool 146.
  • the housing E is connected to the casing 38 in the position shown in broken lines in FIGURE 1 by slipping the trunnions 186) and 132 into the entrance openings 256 and 269, respectively, and then moved into the slots 254 and 258, respectively. With the trunnions 1% and 182 to the extreme left in the slots 254 and the lamp housing E is then pivoted upon the trunnions upwardly through the opening 54 and into the casing 38. The housing is then moved to the right, FIGURE 1, whereby the lip 262 engages the edge of the bottom 52. The catch lock 264 is then engaged with the hook 2555 thereby securing the housing E in the operative position shown in FIGURE 1.
  • the negative support 173 is forced against the paper 12 drawing it upwardly from the position P and upon the holder 173.
  • the pressure roller 216 or" the housing E is moved into position against the first tendency drive roller 72 with the paper 12 therebetween and the pressure roller 33 is also moved into position against the second or lower tendency drive 88 with the paper 12 therebetween. In this position the paper 12 is upon and against the negative mask C on the negative support 173.
  • the paper 12 is fed in successive intermittent lengths to the roller 14, FIGURE 1, in the printer B where it travels upwardly over the roller 16 and thence to friction tendency drive 62 as heretofore described and shown in FIGURE 1.
  • the friction drive 62 slips and the drive roller 72 does not transport any paper, and the slight slack or loop D in the paper 12 over the negative support 173 (shown in broken lines, FIGURE 1) is taken up by the second friction tendency drive 88 and the paper is then brought upon and in contact with the entire surface of the holder 173 at which time it is printed.
  • the slack or loop D is intentionally formed by the diameter of the upper drive 62 being larger than the diameter of the lower take-up drive 38.
  • the rate of linear travel produced thereby is greater than the rate of linear take-up by the lower take-up drive 88.
  • This difference in travel produces the unsupported loop D when the paper is moving.
  • the loop D is produced above the holder 173 and taken up to bring the paper down in intimate contact with the holder 173.
  • the paper 12 moves in an unsupported loop over the surface of the negative C thereby preventing abrasion of the paper and the negative mask C by contact of one with the other. It is thus seen that the paper 12 is not drawn over the surface of the negative mask C thereby preventing abrasion of the same which is a distinct advantage. It will also be seen that with the above construction no pressure plate is needed to cause the print paper 12 to contact the negative.
  • the drive 83 can then slip and any excess of paper is taken up by the take-up spool from the light locks 13% and 132.
  • the lamp 242 and the timer 244 are actuated simultaneously by control mechanism (not shown) in printer B.
  • the timer 2% controls the period of time the printing lamp 242 is energized.
  • the message or indicia M of the negative mask C, FIGURE 9 is printed upon the sensitized paper 12 adjacent the latent image thereon previously printed by the printer B.
  • the print paper 12 has a photo image printed thereon.
  • the auxiliary unit A is used.
  • the latent image produced upon the paper 12 in printer B must be positioned on the negative mask C with regard to the message or indicia M on the mask C, FIGURES 9 and 10.
  • the position of the indicia on the mask C varies from mask to mask, and as a result the positioning of a latent image on paper 12 on the negative mask holder will vary.
  • the following procedure is followed:
  • the roller 16 in moving the roller 16 downwardly, the loop formed over roller 16 is less in length, and a given point thereon is therefore moved a greater distance (to X instead of Y) because there is less take-up paper in the loop over roller 16.
  • the roller 16 is moved upwardly on the support arm 23. As a result a point on the paper formerly at X is moved to point Y. All subsequent positioning of the image which is on print paper 12 is at Y instead of X.
  • a device for contact printing indicia on photographic strip print paper a casing having an open bottom and an opening for receiving print paper, means for intermittently supplying strip print paper to said casing via said opening, a lamp housing having an arcuate negative support, an exposure lamp mounted in said lamp housing substantially equidistant from the surface of the arcuate negative support, a first pressure roller mounted on the upper end of said lamp housing, a second pressure roller mounted on the lower end of said lamp housing, a first friction tendency drive roller carried by said casing and in engagement with said first pressure roller for moving print paper extending therebetween and from said casing opening, a second friction tendency drive roller carried by said casing and in engagement with said second pressure roller for moving print paper therebetween, which paper comes from said first friction tendency drive roller, means for rotating said first and second friction tendency drive rollers the diameter of said first drive roller being greater than the diameter of said second drive roller, to thereby produce an unsupported loop of print paper upon the negative support during the movement of paper from said first friction tendency drive roller to said second friction tendency drive
  • a casing having an open bottom, a lamp housing having an arcuate negative supporting member, means for pivotally moving said lamp housing into and out of said casing, first and second friction tendency drive means for drawing print paper er and above said negative support, means for intermittently supplying print paper to said first drive means, means for forming a loop in the paper above said negative supporting member, said second friction tendency drive means causing the loop of print paper formed to be drawn tightly over the arcuate negative support when the print paper is stopped at said first friction tendency drive means.
  • a device for contact printing indicia on photographic print paper a casing, a lamp housing having an arcuate negative support member, means for pivotally mounting said lamp housing on said casing for movement into and out of said casing, first and second drive roller means mounted in said casing, means for intermittently supplying print paper to said first drive roller means, first and second pressure roller means mounted on said lamp housing for contact with said first and second drive roller means respectively, said first drive roller means having a diameter greater than that of said second drive roller means whereby a slight loop is formed in the print paper above said negative support between said first and second drive roller means when the paper is moved from said first drive roller means to said second drive roller means, the loop of print paper being taken up by said second drive roller means when the movement of the paper to said first drive roller means is stopped thereby causing the print paper to be brought into intimate contact with said negative support, and a lamp within said lamp housing substantially equidistant from the surface of said negative support for exposing the negative on said negative support to the print paper.
  • a device for contact printing indicia on photographic print paper a casing, a lamp housing having a negative support member, means for p-ivotally mounting said lamp housing on said casing for movement into and out of said casing, first and second drive roller means mounted in said casing, means for intermittently supplying print paper to said first drive roller means, first and second pressure roller means mounted on said lamp housing for contact with said first and second drive roiler means respectively, said first drive roller means having a diameter greater than that of said second drive roller means whereby a slight loop is formed in the print paper upon said negative support between said first and second drive roller means when paper is moved from'said'first drive roller means to said second drive roller means, the loop of print paper being taken up by said second drive roller means when the movement of the paper to said first drive roller means is stopped thereby causing the paper to be brought into intimate contact with said negative support, a lamp within said lamp housing substantially equidistant from the surface of said negative support for exposing the negative on said negative support to the print paper
  • a lamp housing having an arcuate negative support member, a casing for said lamp housing, an exposure lamp mounted in said lamp housing, first and second drive roller means mounted in said casing, first and second pressure roller means mounted on said lamp housing adapted to contact said first and second drive roller means to move print paper from said first drive roller means to said second drive roller means and over said negative holder, means for intermittently supplying print paper to said first drive roller, means for intermittently stopping said drive rollers to position the print paper upon the negative support for exposure, the diameter of said first drive roller being greater than that of said second drive roller whereby a loop is formed in the print paper above the negative support during the movement of paper from said first drive roller means to said second drive roller means prior to the paper being positioned upon and in contact with the negative support by said second drive roller means when the paper is stopped at said first drive roller means.
  • the device of claim 5 further characterized by means for varying the position of the print paper upon the negative support.
  • a device for contact printing indicia on photographic print paper a casing, a lamp housing having an arcuate negative support, means for pivotally mounting said lamp housing on said casing for movement into and out of said casing, first and second friction tendency drive roller means mounted in said casing, means for intermittently supplying strip print paper to said first drive roller, means for rotating said drive roller means to transport print paper through said casing and upon said negative support, first and second springurged pressure roller means mounted on said lamp housing for contact with said first and second drive roller means respectively, said first drive roller means having a diameter greater than that of said second drive roller means whereby a slight loop is formed in the print paper above said negative support between said first and second drive roller means as the print paper moves between said first and second drive rollers, the loop of print paper being taken up by said second drive roller means when the print paper is stopped at said first drive roller means and brought into intimate contact with said negative support, a lamp within said lamp housing substantially equidistant from the surface of said negative support, and means for varying the position of the print

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection-Type Copiers In General (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
US143791A 1961-10-09 1961-10-09 Auxiliary contact printer unit for photographic printing machine Expired - Lifetime US3155025A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US143791A US3155025A (en) 1961-10-09 1961-10-09 Auxiliary contact printer unit for photographic printing machine
DEP30243A DE1195601B (de) 1961-10-09 1962-09-27 Vorrichtung zum Kontaktkopieren von Vermerken u. dgl. auf streifenfoermigem, photographischem Papier
AT776262A AT242509B (de) 1961-10-09 1962-10-01 Rollenkopiermaschine mit einer Vorrichtung zum Kontaktkopieren von Vermerken in der Nähe eines latenten Bildes
SE10652/62A SE315802B (enrdf_load_stackoverflow) 1961-10-09 1962-10-04
GB38274/62A GB1012687A (en) 1961-10-09 1962-10-09 Photographic printing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US143791A US3155025A (en) 1961-10-09 1961-10-09 Auxiliary contact printer unit for photographic printing machine

Publications (1)

Publication Number Publication Date
US3155025A true US3155025A (en) 1964-11-03

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ID=22505657

Family Applications (1)

Application Number Title Priority Date Filing Date
US143791A Expired - Lifetime US3155025A (en) 1961-10-09 1961-10-09 Auxiliary contact printer unit for photographic printing machine

Country Status (5)

Country Link
US (1) US3155025A (enrdf_load_stackoverflow)
AT (1) AT242509B (enrdf_load_stackoverflow)
DE (1) DE1195601B (enrdf_load_stackoverflow)
GB (1) GB1012687A (enrdf_load_stackoverflow)
SE (1) SE315802B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3694080A (en) * 1970-03-09 1972-09-26 Massachusetts Inst Technology Method of and apparatus for photoprinting conductor patterns on the curved surfaces of transducers

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2223341A (en) * 1938-11-17 1940-12-03 Allan M Ernst Photographic printing machine
US2394817A (en) * 1943-07-19 1946-02-12 Chicago Aerial Survey Company Photographic printer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2223341A (en) * 1938-11-17 1940-12-03 Allan M Ernst Photographic printing machine
US2394817A (en) * 1943-07-19 1946-02-12 Chicago Aerial Survey Company Photographic printer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3694080A (en) * 1970-03-09 1972-09-26 Massachusetts Inst Technology Method of and apparatus for photoprinting conductor patterns on the curved surfaces of transducers

Also Published As

Publication number Publication date
DE1195601B (de) 1965-06-24
GB1012687A (en) 1965-12-08
AT242509B (de) 1965-09-27
SE315802B (enrdf_load_stackoverflow) 1969-10-06

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