摘要:
Scratch resistant and antistatic sound and picture carriers made of synthetic resins are obtained by providing their surfaces with thin metal layer. The previously known gold layers applied electrolytically or in high vacuum have the disadvantage that they either were not sufficiently resistant to abrasion or the quality of reproduction was greatly impaired. Better results are obtained by providing the surfaces of the sound or picture carrier (1) with a thin coating (2), made of an iron-chromium-nickel alloy applied in a high vacuum and in a given case coating this layer with a noble metal coating (3), especially a gold coating, likewise applied in a high vacuum.
摘要:
A lithographic printing process wherein an illuminated image on a document is scanned in a series of parallel sweeps with a photocell, applying an electric wave signal to a magnetic recording head with the amplitude of said signal determined by the output of the photocell and a function of the optical density of the image being scanned. The magnetic head has a width of from about 0.5 mils to about 5 mils and traverses a magnetic recording medium in a series of aligned parallel paths analogous to those scanned by the photocell to form a latent magnetic image in the magnetic recording medium, which image is a replica of the image being scanned. The horizontal spatial frequency is from about 200 to 1000 cycles/inch. The thus formed latent magnetic image is decorated with an oleophilic magnetic toner. The oleophilic magnetic image is transferred under pressure to a smooth heated lithographic substrate. If necessary, the toner is further heated to effect complete coalescence thereof. The thus formed lithographic printing plate is then used for lithographic printing.
摘要:
A playing apparatus, more specifically a video player for playing round records with a central hole, which are made of a transparent material, which records at one side have a transparent surface and at their other side are provided with information tracks which are optically readable with the aid of a read beam, which tracks are covered by a light-reflecting layer. In order to enable both relatively thick rigid records and relatively thin flexible records to be played on one playing apparatus, the invention provides a transparent adapter disc, which together with a flexible record can be positioned on the playing apparatus and driven in a rotary fashion. In order to prevent dust particles from being trapped between the flexible record and the transparent adapter disc, the adapter disc may be provided with a central recess with a number of air admission apertures at the circumference thereof, so that during operation a thin film of air is formed between the flexible record and the adapter disc.
摘要:
A servo system is disclosed for use with a motor such as the drive motor for the head wheel of a recording and reproducing apparatus, for example. The servo system utilizes a phase comparator to phase lock a feedback signal supplied by a motor tachometer and a reference signal to control the phase and speed of the drive motor. The reference signal is generated by a digital processor which is adapted to adjust the phase of the reference signal to a predetermined lead relative to a standard frequency source and also includes means for adding or subtracting incremental phase adjustments by comparing the phase of said tachometer signal with the phase of said standard frequency source and providing error signals in said incremental amounts for adjusting the resulting reference signal that is applied to the tachometer phase comparator.
摘要:
A device for the thermomagnetic recording of information on a highly coercive magnetizable recording medium. For this purpose is used, for example, a video recorder of the "helical scan" or "transversal scan" type whose drum has a co-rotating mirror and system of lenses with which an energy beam is directed and focussed on the recording medium at a small distance in front of the recording gap of the magnetic head. As a result of this the coercive force of the recording medium is locally reduced while using a very short heating time so that the medium can be recorded there by the head.
摘要:
Composing method and apparatus for publications such as newspapers in which copy from various sources is entered into a computer in coded form for use in controlling a phototypesetter to prepare a page copy. Certain copy including artwork which may be half tone or continuous tone is scanned to provide the numerical data necessary for controlling the photoypesetter while text material is first edited on an editing terminal and then stored with or without phototypesetting instructions in the computer. Each item to be included in the publication is identified by a heading and layout department instructs the computer as to where the items are to appear. For this purpose the layout department has a layout terminal for displaying page areas with previously assigned sections outlined and identified and for entering coordinates of newly assigned sections into the computer. The terminal can display magnified portions of the page area. In reproducing continuous tone copy, dot characters are stored in a character memory and used to provide different half tone screen sizes.
摘要:
A high speed non-impact printing system in which data to be printed is recorded on a magnetic tape as an array of elements to which a magnetic toner is applied and subsequently transferred onto an associated page. The system can be employed to print alphanumeric characters, symbols and the like, as well as pictorial or graphical information, and individual characters or entire lines can be printed during a print cycle.
摘要:
AN INFORMATION STORAGE SYSTEM FOR STORING DOCUMENT INFORMATION, RETRIEVING SAME AND PERFORMATION OPERATICS WITH RESPECT TO SAID INFORMATION. THE INFORMATION IS STORED IN THE FORM OF VIDEO SIGNALS CAPABLE OF GENERATING STILL IMAGES ON A VIEWING SCREEN. IN ONE FORM, THE IMAGE INFORMATION IS GENERATED AS A PLURALITY OF LINES OF ALPHANUMERICAL CHARACTERS SUCH AS GENERATED BY A COMPUTER OR BY MEANS OF REPRODUCED VIDEO PICTURE SIGNALS STORED ON MAGNETIC TAPE AND SELECTIVELY REPRODUCED TO GENERATE VISUAL IMAGES OF TYPEWRITTEN LISTS OF WORDS SUCH AS CATALOG INFORMATION, DESCRIPTIONS OF DATA, FORMULAS, ETC. UPON VISUALLY MONITORING SAID INFORMATION, THE PERSON READING SAME IS PROVIDED WITH AND ACTIVATES MANUAL CONTROL MEANS FOR GENERATING ELECTRICAL SIGNALS REPRESENTATIVE OF A SELECTED OF SAID LINES OF CHARACTERS, PART OF A LINE OR A PLURALITY OF LINES WHICH SIGNALS MAY BE IN CODE OR VIDEO FORM CAPABLE OF BEING USED BY A COMPUTER. THE CODE SIGNALS MAY BE GENERATED BY OPERATING ON THE PORTION OF THE VIDEO SIGNAL REPRODUCED IN SCANNING THE PORTIONS PORTION OF THE IMAGE BEING VIEWED ON A CATHODE RAY TUBE SCREEN OR BY SCANNING AND REPRODUCING SELECTED PORTIONS OF THE VIDEO SIGNAL CONTAINING INFORMATION WHICH IS RECORDED IN CODE FORM SUCH AS CHARACTCTERIZED BY VERIATIONS IN AMPLITUDE AND/OR FREQUENCY AND PROVIDED PREDETERMINED LOCATIONS WITH RESPECT TO RESPECT PORTIONS OF THE VIDEO SIGNAL RESPRESENTATIVE OD A LINE OF CHARACTERS AND CAPABLE OF MODULATING A CATHODE RAY TUBE READ BEAM TO GENERATE SAID CHARACTERS ON A VIEWING SCREEN. SELECTIVE REPRODUCTION OF INFORMATION REPRESENTATIVE OF A LINE OF CHARACTERS OR GROUPS OF CHARACTERS MAY BE EFFECTED IN A NUMBER OF MANNERS SUCH AS BY GENERATING A CODE SIGNAL WHICH IS OPERATIVE TO EFFECT THE SELECTIVE REPRODUCTION OF THAT PORTION OF THE VIDEO PICTURE SIGNAL RECORDING FROM WHICH THE MONITORED IMAGE WAS GENERATED OR THE DESIRED CODE SIGNAL FROM A RECORDING ON THE SAME RECORD MEMBER CONTAINING THE VIDEO SIGNAL RECORDING USED TO GENERATE THE MONITORED IMAGE AND THE SELECTED LINE OF CHARACTERS. SAID SELECTIVE REPRODUCTION OF INFORMATION REPRESENTATIVE OF A SELECTED LINE OF CHARACTERS VIEWED BY THE OPERATOR OF THE APPARATUS MAY ALSO BE EFFECTED BY THE OPERATOR''S CAUSING THE READ BEAM OF THE CATHODE RAY TUBE BEING SCANNED OR MANITORED TO SCANED EITHER THE SELECTED LINE OF CHARACTERS AND LOGICALLY OPERATE ON THE VIDEO SIGNAL SO GENERATED TO GENERATE SAID CODE SIGNAL REPRESENTATIVE THEREOF OR TO SCAN CODED INFORMATION GENERATED AS SPOTS OR VARIATIONS IN COLOR OR GREY SCALE ALONG, ABOVE OR BELOW THE SELECTED LINE OF CHARACTERS TO GENERATE SAID CODE SIGNALS. IN YET ANOTHER FORM, A MANUALLY GUIDED OR OTHERWISE DIRECTED PHOTO OPTICAL MEANS SUCH AS A PHOTOCELL OR LIGHT PEN IS EMPLOYED TO SCAN THE LINE OF CHARACTERS OR VISUAL CODE ON FORMATION ASSOCIATED WITH SAID LINE TO GENERATE THE DESIRED CODE INFORMATION AS ELECTRICAL SIGNALS WHICH MAY BE USED BY A COMPUTER.
摘要:
A color video signal recording and reproducing system frequency converts a carrier chroma signal of a color television video signal to lower its frequency band to a recordable level. This signal is then mixed with a luminance signal of a limited frequency band to produce a combined signal which is supplied to a monochrome video tape recorder for recording on a magnetic tape. The frequency and phase of a color burst signal of a carrier chroma signal has a variation in the timing axis. An automatic phase control circuit takes this burst signal out of a video signal reproduced from the magnetic tape. The phase control circuit comprises a feedback loop including a voltage control oscillator, color burst keyer, phase comparator, and at least one frequency convertor. The feedback loop signal is made to agree with the output of a reference subcarrier generator. The carrier chroma signal is frequency converted and combined with a luminance signal taken out from the reproduced signal to provide a color video signal. This color signal includes a carrier chroma signal, from which the variation in the timing axis has been removed, and a luminance signal having a limited frequency band.
摘要:
As a beam is deflected to transversely scan sheets as they are conveyed past the deflected beam for transferring image intelligence between a document image form on the sheet and a video signal form for processing by a video processing circuit, the beam is deflected in the direction of the travel of the conveyed sheets at a velocity relative to the velocity of travel of the sheets to produce complementary motion so that the entire sheet is scanned by the beam during a single frame video signal. The operations of the video processing circuit, sheet transport mechanism and beam deflection signal generator are time synchronized with the vertical synchronizing signal associated with the video signal such that each sheet is positioned at the location at which the first upstream line of the raster of scanned lines is produced when the deflections of the beam and transduction of the video intelligence signal is commenced.