US3557675A - Apparatus for controlling the passage of photomaterial through an electronic phototype setter - Google Patents

Apparatus for controlling the passage of photomaterial through an electronic phototype setter Download PDF

Info

Publication number
US3557675A
US3557675A US740894A US3557675DA US3557675A US 3557675 A US3557675 A US 3557675A US 740894 A US740894 A US 740894A US 3557675D A US3557675D A US 3557675DA US 3557675 A US3557675 A US 3557675A
Authority
US
United States
Prior art keywords
photomaterial
setter
developing apparatus
switch means
guideway
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
US740894A
Other languages
English (en)
Inventor
Roman Koll
Hans Penza
Ulrich Sendtko
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.)
Dr-Ing Rudolf Hell Kg Kiel
HELL RUDOLF DR ING KG
Original Assignee
HELL RUDOLF DR ING KG
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 HELL RUDOLF DR ING KG filed Critical HELL RUDOLF DR ING KG
Application granted granted Critical
Publication of US3557675A publication Critical patent/US3557675A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41BMACHINES OR ACCESSORIES FOR MAKING, SETTING, OR DISTRIBUTING TYPE; TYPE; PHOTOGRAPHIC OR PHOTOELECTRIC COMPOSING DEVICES
    • B41B21/00Common details of photographic composing machines of the kinds covered in groups B41B17/00 and B41B19/00
    • B41B21/32Film carriers; Film-conveying or positioning devices

Definitions

  • the present invention relates to apparatus for controlling the passage of photomaterial through anelectronic phototype setter cooperating with an automatically operated developing apparatus.
  • Electronic phototype setters controlled by computers, can set several hundreds of characters per'se cond.
  • a text set in a phototype setter is initially only latent in the form of an exposed film or photopape'r and is not immediately utilizable.
  • Slip proofs preferably consist of paper which is provided with a photosensitive layer suitable for rapid developing.
  • the photopaper is fed through the phototype setter by an automatic developingapparatus. There it passes through two baths, an activator bath and a stabilizer bath, and
  • the setting operation with the phototype setter and the developing apparatus must be regarded as a continuous operation, at least for periods of time during which a whole roll of material is set.
  • the length of the strip of a roll amounts to about 100 meters.
  • the speed of production of the photomaterial in the setting device which has been exposed and is being developed is varied.
  • the length of the lines and the size of the script used has a bearing on this speed.
  • the narrower the column and the greater the size of script the quicker the exposed strip is produced.
  • Production continues correspondingly more slowly in the case of long lines and small script.
  • Further factors introduce further irregularities. For example, small setting intervals may arise which are dependent upon the computer program.
  • the setter can even come to a complete standstill from time to time, forexample, when new photomaterial has to be inserted, or a punched or magnetic control tape has to be changed. 0n the other hand, blank advance movements have an, accelerating effect in the setting proofs.
  • the speed of production of exposed material is, therefore, irregular within wide limits.
  • the developing apparatus on the other hand requires a constant speed of operation.
  • the darkening of the character images depends upon the time that the material dwells in the activator fluid. Deviations from a certain speed of passage upon which a specified blackening necessary for the printing process depends, are not allowed. However, the developing apparatus should above all not be stopped while photomaterial is still located therein since the material would become unusable.
  • the object of the invention is to make possible the cooperation of both apparatus despite these very'different operational requirements. This is ensured according to this in invention by providing switching means which cause the setter to stop when the photomaterial accumulates between the outlet of the setter and the inlet of the developing apparatus, and to cut through the photomaterial when it is stretched, and prevents the photomaterial from entering the developing apparatus if a previously cut piece of material has not passed completely thereinto.
  • a cutting device is arranged between the outlet of the phototype setter and the inlet of the developing apparatus, and an elongated guideway is provided for the photomaterial, furthermore a contacting device, responding when the photomaterial accumulates in said guideway, actuates to stop the production'of clock pulses in the phototype setter and the acceptance of further setting information, and a further contacting device responsive to the pull of the photomaterial in the guideway, actuatcs to initiate an accelerated feed of the photomaterial by a certain length, and furthermore the cutting device is arrangedto cause the photomaterial to be out after this feed has terminated.
  • FIG. 1 shows the basic constructionof the apparatus; and FIG. 2 shows in detail the guideway for the photomaterial.
  • the setter represents a phototype setter, which consists of a cathode ray tube 1 and a central control apparatus 2.
  • the setter receives its order for operation anddata from an input device 4 via a conductor 3.
  • the input device 4 may be a tape recorder, a punched tape-reading device or even acomputer.
  • the data supplied to the setter via the conductor 3 are partly orders whichrelate to the operation, e.g. setting, width, size of script, beginning of a line, inter alia, and on the other hand, they are numbers or addresses of characters which are called up for setting.
  • a conductor 5 serves to; regulate the data flow between the input device 4 and the central control apparatus 2 of the setter. Then, data can only reach the control apparatus 2 if the conductor 5 indicates that the setter is ready for response.
  • the images of the characters are stored in coded form in an electronic store unit of the setter.
  • the image information is interrogated in the store unit and serves to control the cathode ray tube 1 via a conductor 6 so that the characters appear on the screen as luminous images.
  • the luminous characters are formed on the image plane of a film gate 8 by means of an optical system 7.
  • a strip of photomaterial 10 is guided from a film casette 9, between guide rollers 11 and is exposed in the film gate 8. From there, the photomaterial is fed between conveyor rollers 12 andbetween the blades of a cutting device 13 into the opening in a guideway 14; After passing through this guideway 14, the photomaterial emerges at the lower end and passes betweentwo rubber rollers 15. Afterthe photomaterial has been gripped by these rollers, it passes at constant speed into a developing apparatus 16. The further feed of the photomaterial through the developing apparatus and a following drying apparatus is automatically effected by means of guide rollers, more drive rollers and deflector plates. This is described later.
  • the photographic recording of the characters on the photomaterial located in the film gate 8 begins.
  • the input device 4 issues an order to feed the photomaterial with the information regarding thenumber of path quanta, around which the photomaterial is to be conveyed.
  • the photomaterial is, therefore, conveyed piece-bypiece, but each piece continuously.
  • the orders for material feed reach a control apparatus 18 via the central control apparatus 2 and a conductor 17, the feed order being evaluated in the control apparatus 18 and conveyed via a conductor 19 to the drive rollers 12 which push the photomaterial further.
  • the guideway 14 serves as a buffer between the setter and the developing apparatus. It is, therefore, comparatively long and is appropriately shaped. As seen on the drawings, the right-hand side is straight while the left-hand side is curved.
  • the photostrip in the guideway 14 becomes shorter. It is thereby stretched and adapts itself closely to the right-hand sidewall of the guideway.
  • a contact 22 is actuated which transmits a signal to the central control apparatus 2 viaa conductor 23.
  • the contact 22 is actuated before the photomaterial is stretched too much and therefore the phototype setter has enough time to finish the line which it had begun to set.
  • the order subsequently coming from the input device 4 which has for its results the return of the electron beam and the further feed of the photomaterial, is used in this case for interrupting the production of clock pulses in the central control device 2 and consequently stopping the setting operation.
  • the orders given continuously during the setting operation via the conductor 5 to the input device 4 are the first to stop.
  • a signal passes at the same time via the conductor 17 to the control apparatus 18.
  • the first result thereof is a release of the drive of the conveyor rollers 12 via the conductor 19, which rollers move on the photomaterial by a certain distance.
  • the length of this distance is equalto a certain number of length quanta and is of such size that the part of the photomaterial which has just been exposed is conveyed a few centimeters beyond the cutting-position.
  • the cutting device 13 is actuated via a conductor 24 and the strip is cut through.
  • the cut off strip can now pass unhindered through the guideway 14 into the developing apparatus 16.
  • the tension of the photo strip and consequently the pressure againstthe contact 22 ceases. Said contact opens and the setting process continues.
  • the operation which has just been described occurs only in particular cases, namely when an unforeseen and unintended obstniction occurs in the setting operation.
  • THis may, for example, be the case if a new magnetic tape or a new punched control tape has to be inserted in the input device or if a punched control tape is torn and must be repaired. in this case, the photostrip must be cut through in order that the perforation does not tear or otherwise damage the photomaterial.
  • a cutting control is not given by the computer and, therefore, the cut is effected at a position determined by chance. However, the measures described prevent a line ,from being lost.
  • the strip of photomaterial is cut only when the last exposed part has been conveyed further by a rapid advance movement up to a position after the cutting position and consequently cannot be lost. Due to this blank advance movement, a large line space occurs which is not provided for in the program. The line space, however, can easily ,be cut out later when the script is mounted.
  • the cutting controls are normally given by the program so that the cuts are made at the appropriate part in the text.
  • the character sizes, the line steps and the length of the lines to be used for a setting order are known to the programmer. Therefore, he knows exactly how much photomaterial is conveyed per unit of time during undisturbed setting operation. If this length is smaller than the material length which the developing apparatus can process and which is also known to the programmer, the photostrip must be cut through. However, the programmer knows that the cuts must not be placed between the lines of a continuous paragraph, but between paragraphs or, better still, between columns. Besides, larger spaces exist here in order to be able to cut the photostrips for mounting purposes.
  • rollers 31 are driven rubber rollers and have the same speed of rotation as the former, so that a piece of photostrip fed therein, which is gripped by the rollers 31, is conveyed further even when it has left the rollers 15.
  • the smallest length of photomaterial admissible for developing is thus determined by the distance between the rollers 15 and 31, and amounts to about 30 cm.
  • the photostrip is now pushed by the rollers 31 into a drying chamber 32. It slides through a roller grid 33 and is deflected further by a deflector plate 34 between rollers 35. These are also driven rollers and give the photostrip the same speed of feed as rollers l5 and 31.
  • the rollers 35 feed the already developed and dried photo strip from the apparatus into a pickup device (not shown) from which the set material is taken.
  • heating resistors 36 are arranged on both sides ofthe roller grid 33, which dry the photostrip by radiant heat.
  • a fan 37 supplies an air flow which removes the steam, issuing from the photomaterial, through opening 38.
  • Roller 39 is mounted in fixed'manner and serves as an abutment.
  • the roller 40 is connected as a contactor roller to a resilient contact 41 via a web. If, as shown in the drawing, a piece of photomaterial is located between the rollers 15 and the roller 39, the contactor roller 40 ispressed towards the left. The contact 41 is closed and two magnets 42 to the right and left of the guideway 14 are energized. Thereby two pins 43 are pushed through holes in the wall of the deflector plates. These pins are located immediately above the rollers 15 and they are resilient and lie :with such a light pressure against the incoming photostrip that they do not damage the strip.
  • the guideway 14 which is shown only schematically in FIG. 1, is shown to a larger scale and explained more clearly in FIG. 2.
  • the guideway 14 must, in addition to checking whether photomaterial has accumulated or is stretched, also fulfill a storage or buffer function. Should, for certain reasons, the photomaterial not be cut, although the speed of setting is slower than the speed of passage through the developing apparatus, a blank advance movement must be given to the photomaterial by computer orders after each setting of a column and this blank advance compensates for the difference in speed.
  • the blank advance speed is, at about 12 meters per minute, which is greater than the speed of development, which amounts to about 4 meters per minute.
  • the advance length can be comparatively large and can amount to the length of the whole guideway.
  • the delivered photomaterial must be stored in the guideway 14.
  • the guideway is therefore constructed as illustrated in FIG. 2.
  • the strip passing into the guideway accumulates in several waves inside the guideway 1.4 between the fixed right-hand wall and a movable plate 44 on the left-hand side.
  • This plate is pushed away by the springs 45 and 46 t'rom the left-hand sidewall of the guideway 14 with a small force. It carries a pin 47 which projects through a bore in the left-hand sidewall and actuates the contact 20.
  • the length of the stored strip must be twice as long as the length of the guideway 14. This length corresponds to the storage capacity of the guideway 14.
  • FIG. 2 Also the safety contact 22 which was shown only schematically in FIG. 1 has been illustrated more clearly in FIG. 2.
  • the strip 9 of photomaterial is, as shown in FIG. 2, inserted into the guideway somewhat obliquely towards the left against the deflector plate 44. It slides over a contactor spring 48 secured to the right-hand upper inlet edge, without touching it or exerting pressure thereon, not even if the photostrip has formed waves.
  • the photostrip becomes tensioned due to the tension of the rollers 15. This is conveyed to a spring 48 which is curved towards the right and actuates the contact 22 with the aid of a pin 49. The further effect of this contact will be apparent from the description hereinabove.
  • Apparatus for controlling the passage of photomaterial through an electronic phototype setter cooperating with an automatically operating developing apparatus comprising first switch means actuatedby the photomaterial to cause the setter to stop when the photomaterial accumulates between an outlet of the setter and an inlet of the developing apparatus, a cutting device, a second switch means actuated by the photomaterial for operating said cutting device to cut through the photomaterial when it is stretched.
  • Apparatus for controlling the passage of photomaterial through an electronic phototype setter cooperating with an automatically operating developing apparatus comprising: first switch means actuated by the photomaterial to cause the setter to stop when the photomaterial accumulates between an outlet of the setter and an inlet of the developing apparatus, a cutting device, second switch means actuated by the photomaterial for operating said cutting device to cut through the photomaterial when it is stretched, and a blocking device, third switch means actuated by the photomaterial for operating said blocking device to prevent the photomaterial from entering the developing apparatus in the case that a previously cut piece of material has not passed completely thereinto.
  • said first switch means includes a plate resiliently arranged on one side of said guideway pressed sideways by the strip of photomaterial which accumulates in waves in said guideway, said first switch means contact being actuated by said plate when the accumulation pressure has attained a certain value.
  • said second switch means includes a resilient spring arranged on one side near an inlet opening of the guideway, said spring being curved sideways by the tightening of a strip of photomaterial, said second switch means contact being actuated by said spring when the tension of the strip has attained a certain value.
  • Apparatus as claimed in claim 1 and further characterized by: a contactor arranged at the inlet of the developing apparatus to establish the existence of photomaterial at a contacting position, a plurality of electromagnetically controlled, resilient locking pins arranged closely in front of the contractor at the end of a guideway leading into the developing apparatus, and a contact actuated by the contractor when photomaterial is present at the contacting position, for moving said resilient locking pins into light contact with the material to prevent entrance of other strips of the photomaterial into the developing apparatus until the first-mentioned photomaterial moves past the contacting position.
  • An apparatus for controlling the passage of photomaterial through an electronic phototype setter comprising: means for delivering the photomaterial through the phototype setter; means for delivering the photomaterial from the setter to a developing apparatus; means positioned between said setter and said developing apparatus for accumulating the photomaterial; first switch means responsive to the accumulation of the photomaterial between said setter and said developing apparatus to stop further advancement of the photomaterial to

Landscapes

  • Photographic Processing Devices Using Wet Methods (AREA)
  • Photographic Developing Apparatuses (AREA)
US740894A 1967-07-06 1968-06-28 Apparatus for controlling the passage of photomaterial through an electronic phototype setter Expired - Lifetime US3557675A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH0063211 1967-07-06

Publications (1)

Publication Number Publication Date
US3557675A true US3557675A (en) 1971-01-26

Family

ID=7162215

Family Applications (1)

Application Number Title Priority Date Filing Date
US740894A Expired - Lifetime US3557675A (en) 1967-07-06 1968-06-28 Apparatus for controlling the passage of photomaterial through an electronic phototype setter

Country Status (5)

Country Link
US (1) US3557675A (de)
CH (1) CH492551A (de)
FR (1) FR1598917A (de)
GB (1) GB1200555A (de)
NL (1) NL6809292A (de)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3733127A (en) * 1970-08-14 1973-05-15 Dennison Mfg Co Continuous tone photocopier
US3741651A (en) * 1970-10-15 1973-06-26 Matsushita Electric Ind Co Ltd Recording device
US3746444A (en) * 1971-11-24 1973-07-17 Bessemer Securities Corp Microfiche recorder and processor
US3774520A (en) * 1972-06-23 1973-11-27 A Smith Developing mechanism for microfilm
US3818126A (en) * 1972-08-23 1974-06-18 Telautograph Corp Facsimile system
US3856396A (en) * 1966-04-18 1974-12-24 Minolta Camera Kk Electronic photocopying machine
USRE29254E (en) * 1971-11-24 1977-06-07 Quantor Corporation Microfiche recorder and processor
DE2705181A1 (de) * 1977-02-22 1978-08-10 Nippon Electric Co Vorrichtung zur foerderung eines aufzeichnungstraegers
US4136946A (en) * 1976-12-28 1979-01-30 Noritsu Koki Co., Ltd. Photographic printer and associated processor
US4192594A (en) * 1977-10-21 1980-03-11 Fuji Photo Film Co., Ltd. Camera film processor
US4223994A (en) * 1978-10-03 1980-09-23 Harris Corporation Typesetting transport mechanism
US4260234A (en) * 1979-06-25 1981-04-07 Autologic, Inc. Media transporter for phototypesetter-processor
US4272185A (en) * 1978-09-14 1981-06-09 Canon Kabushiki Kaisha Photographic apparatus
US4275959A (en) * 1979-05-10 1981-06-30 Edo Western Corporation Film processor apparatus
US4299458A (en) * 1980-06-02 1981-11-10 Autologic, Inc. Self threading phototypesetter transport system
US4343543A (en) * 1980-06-09 1982-08-10 Schiff Photo Mechanics Multiple image roll film camera
US4396277A (en) * 1980-11-17 1983-08-02 Hunt Norman T Process for saving film in phototype setters
US4405227A (en) * 1979-02-09 1983-09-20 Canon Kabushiki Kaisha Photographic apparatus
US4451141A (en) * 1981-04-15 1984-05-29 Kis France Automatic device for the simultaneous printing and development of photographs
US4531819A (en) * 1983-03-01 1985-07-30 Bell & Howell Japan Ltd. Device for storing exposed film for photographing and developing apparatus
DE3509230A1 (de) * 1984-03-14 1985-09-19 Truth Incorporated, Owatonna, Minn. Schnappzapfen
US4618251A (en) * 1981-10-05 1986-10-21 Canon Kabushiki Kaisha Recording apparatus
US4678305A (en) * 1985-09-27 1987-07-07 Photo-Me International Pcl Photographic camera
US4757334A (en) * 1986-12-09 1988-07-12 Ivan Volent System for density correction of medical imaging film hard copy
US4837601A (en) * 1985-01-30 1989-06-06 Konishiroku Photo Industry Co., Ltd. Automatic photographic paper processing apparatus
US4864355A (en) * 1987-07-21 1989-09-05 Ciba-Geigy Corporation Apparatus for the production of photographic copies
US5075718A (en) * 1990-02-21 1991-12-24 Ushio Denki Exposure apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH619398A5 (de) * 1977-04-14 1980-09-30 Bobst Fils Sa J

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2945429A (en) * 1956-12-28 1960-07-19 Grant Photo Products Inc Photographic film developing apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2945429A (en) * 1956-12-28 1960-07-19 Grant Photo Products Inc Photographic film developing apparatus

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3856396A (en) * 1966-04-18 1974-12-24 Minolta Camera Kk Electronic photocopying machine
US3733127A (en) * 1970-08-14 1973-05-15 Dennison Mfg Co Continuous tone photocopier
US3741651A (en) * 1970-10-15 1973-06-26 Matsushita Electric Ind Co Ltd Recording device
US3746444A (en) * 1971-11-24 1973-07-17 Bessemer Securities Corp Microfiche recorder and processor
USRE29254E (en) * 1971-11-24 1977-06-07 Quantor Corporation Microfiche recorder and processor
US3774520A (en) * 1972-06-23 1973-11-27 A Smith Developing mechanism for microfilm
US3818126A (en) * 1972-08-23 1974-06-18 Telautograph Corp Facsimile system
US4136946A (en) * 1976-12-28 1979-01-30 Noritsu Koki Co., Ltd. Photographic printer and associated processor
DE2705181A1 (de) * 1977-02-22 1978-08-10 Nippon Electric Co Vorrichtung zur foerderung eines aufzeichnungstraegers
US4192594A (en) * 1977-10-21 1980-03-11 Fuji Photo Film Co., Ltd. Camera film processor
US4272185A (en) * 1978-09-14 1981-06-09 Canon Kabushiki Kaisha Photographic apparatus
US4223994A (en) * 1978-10-03 1980-09-23 Harris Corporation Typesetting transport mechanism
US4405227A (en) * 1979-02-09 1983-09-20 Canon Kabushiki Kaisha Photographic apparatus
US4275959A (en) * 1979-05-10 1981-06-30 Edo Western Corporation Film processor apparatus
US4260234A (en) * 1979-06-25 1981-04-07 Autologic, Inc. Media transporter for phototypesetter-processor
US4299458A (en) * 1980-06-02 1981-11-10 Autologic, Inc. Self threading phototypesetter transport system
US4343543A (en) * 1980-06-09 1982-08-10 Schiff Photo Mechanics Multiple image roll film camera
US4396277A (en) * 1980-11-17 1983-08-02 Hunt Norman T Process for saving film in phototype setters
US4451141A (en) * 1981-04-15 1984-05-29 Kis France Automatic device for the simultaneous printing and development of photographs
US4618251A (en) * 1981-10-05 1986-10-21 Canon Kabushiki Kaisha Recording apparatus
US4531819A (en) * 1983-03-01 1985-07-30 Bell & Howell Japan Ltd. Device for storing exposed film for photographing and developing apparatus
DE3509230A1 (de) * 1984-03-14 1985-09-19 Truth Incorporated, Owatonna, Minn. Schnappzapfen
US4837601A (en) * 1985-01-30 1989-06-06 Konishiroku Photo Industry Co., Ltd. Automatic photographic paper processing apparatus
US4678305A (en) * 1985-09-27 1987-07-07 Photo-Me International Pcl Photographic camera
US4757334A (en) * 1986-12-09 1988-07-12 Ivan Volent System for density correction of medical imaging film hard copy
US4864355A (en) * 1987-07-21 1989-09-05 Ciba-Geigy Corporation Apparatus for the production of photographic copies
US5075718A (en) * 1990-02-21 1991-12-24 Ushio Denki Exposure apparatus

Also Published As

Publication number Publication date
NL6809292A (de) 1969-01-08
FR1598917A (de) 1970-07-15
GB1200555A (en) 1970-07-29
CH492551A (de) 1970-06-30
DE1597770B2 (de) 1973-01-25
DE1597770A1 (de) 1970-06-25

Similar Documents

Publication Publication Date Title
US3557675A (en) Apparatus for controlling the passage of photomaterial through an electronic phototype setter
US3586437A (en) High-speed printer
US3733128A (en) Electrophotographic microfilm re-enlarging apparatus
US4260234A (en) Media transporter for phototypesetter-processor
US3591279A (en) Cut and deflect web drive apparatus
US4282997A (en) Apparatus for removing exposed films and backing strips from cassettes
US4056024A (en) Web advancement and cutting mechanism and method
US2930302A (en) Processing of photographic film
US4405227A (en) Photographic apparatus
GB1336149A (en) High speed photoelectorstatic copying machine
US4565442A (en) Method of and apparatus for copying photographic originals
US2968992A (en) Camera apparatus and method of making up printed copy
GB997967A (en) Improvements in or relating to photographic type composing devices and a method of photographically composing type images
US4214834A (en) Photographic copying machine
US2246968A (en) Typewriting machine
US2142853A (en) Magazine construction for copying cameras
US3807855A (en) Method and apparatus for marking photographic print strips
US3815457A (en) Equipment using novel paper storage means
US3705696A (en) Filmstrip and filmstrip retention device
GB1322962A (en) Photographic exposing and developing apparatus
US2153212A (en) Composite printing apparatus for
GB1199102A (en) Optical Step Printer
US3208654A (en) Method and devices for operating apparatus passed through by record carrying films
US3307459A (en) Spacer control for phototypesetting system
US3765583A (en) Ancing mechanism for precisely positioning a perforated web