In this section, the following term is used with the meaning indicated:
"variable" (as a noun) means a feature or property (e.g., a dimension, a physical condition such as temperature, a quality such as density or colour) which, in respect of a particular entity (e.g., an object, a quantity of a substance, a beam of light) and at a particular instant, is capable of being measured; the variable may change, so that its numerical expression may assume different values at different times, in different conditions or in individual cases, but may be constant in respect of a particular entity in certain conditions or for practical purposes (e.g., the length of a bar may be regarded as constant for many purposes).
Attention is drawn to the definitions of terms or expressions used, appearing in the notes of several of the classes in this section, in particular those of "measuring" in class Fulltext... Hierarchy... Expanded...G01 and "control" and "regulation" in class Fulltext... Hierarchy... Expanded...G05.
Classification in this section may present more difficulty than in other sections, because the distinction between different fields of use rests to a considerable extent on differences in the intention of the user rather than on any constructional differences or differences in the manner of use, and because the subjects dealt with are often in effect systems or combinations, which have features or parts in common, rather than "things", which are readily distinguishable as a whole. For example, information (e.g., a set of figures) may be displayed for the purpose of education or advertising (Fulltext... Hierarchy... Expanded...G09), for enabling the result of a measurement to be known (Fulltext... Hierarchy... Expanded...G01), for signalling the information to a distant point or for giving information which has been signalled from a distant point (Fulltext... Hierarchy... Expanded...G08). The words used to describe the purpose depend on features that may be irrelevant to the form of the apparatus concerned, for example, such features as the desired effect on the person who sees the display, or whether the display is controlled from a remote point. Again, a device which responds to some change in a condition, e.g., in the pressure of a fluid, may be used, without modification of the device itself, to give information about the pressure (Fulltext... Hierarchy... Expanded...G01L) or about some other condition linked to the pressure (another subclass of class Fulltext... Hierarchy... Expanded...G01, e.g., Fulltext... Hierarchy... Expanded...G01K for temperature), to make a record of the pressure or of its occurrence (Fulltext... Hierarchy... Expanded...G07C), to give an alarm (Fulltext... Hierarchy... Expanded...G08B), or to control another apparatus (Fulltext... Hierarchy... Expanded...G05).
The classification scheme is intended to enable things of a similar nature (as indicated above) to be classified together. It is therefore particularly necessary for the real nature of any technical subject to be decided before it can be properly classified.
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY (reproduction of pictures or patterns by scanning and converting into electrical signals Fulltext... Hierarchy... Expanded...H04N) [4]
G03
Note(s)
In this class, the following terms are used with the meaning indicated:
"records" means photographs or any other kind of latent, directly-visible or permanent storage of pictorial information, which consist of an imagewise distribution of a quantity, e.g. an electric charge pattern, recorded on a carrier member;
"optical" applies not only to visible light but also to ultra-violet or infra-red radiations. [4]
the production of permanent directly-visible pictures in conformity with an original picture or document, using an intermediate imagewise distribution of an electric or magnetic quantity, such as a charge pattern, an electric conductivity pattern, or a magnetic pattern;
the production of permanent directly-visible pictures using an intermediate imagewise distribution of an electric or magnetic quantity, when the origin and the way of generating said intermediate distribution are not relevant.
This subclass does not cover:
use of electric signals for the transmission of the picture information from the original to the reproduction, i.e. pictorial communication, which is covered by subclass Fulltext... Hierarchy... Expanded...H04N;
production of pictures by heat patterns exclusively, not using an electrostatic or magnetic pattern, which is covered by group Fulltext... Hierarchy... Expanded...B41M 5/00;
production of prints by transferring ink from a printing form to a printing surface, without physical contact and using the force of an electrostatic field, which is covered by subclass Fulltext... Hierarchy... Expanded...B41M;
Recording-members for original recording by exposure e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor (recording surfaces for measuring apparatus Fulltext... Hierarchy... Expanded...G01D 15/34; photosensitive materials for photographic purposes Fulltext... Hierarchy... Expanded...G03C)
Layers for surface-deformation imaging, e.g. frost imaging [2]
G03G 5/024
· ·
Photoelectret layers [2]
G03G 5/026
· ·
Layers in which during the irradiation a chemical reaction occurs whereby electrically conductive patterns are formed in the layers, e.g. for chemixerography [2]
G03G 5/028
· ·
Layers in which after being exposed to heat patterns electrically conductive patterns are formed in the layers, e.g. for thermoxerography [2]
Charge-receiving layers combined with additional photo- or thermo-sensitive, but not photoconductive, layers, e.g. silver-salt layers [5]
G03G 5/16
·
Layers for recording by changing the magnetic properties, e.g. for Curie-point-writing [3]
G03G 7/00
Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof (photosensitive materials for photographic purposes Fulltext... Hierarchy... Expanded...G03C)
G03G 8/00
Layers covering the final reproduction, e.g. for protecting, for writing thereon [2]
Imagewise charging, i.e. laying-down a charge in the configuration of an original image using a modulated stream of charged particles, e.g. of corona ions, modulated by a photoconductive control screen bearing a charge pattern or by optically activated charging means (using charging means controlled by electric image signals Fulltext... Hierarchy... Expanded...B41J) [6]
G03G 13/054
·
using X-rays, e.g. electroradiography [6]
G03G 13/056
·
using internal polarisation [2,6]
G03G 13/06
·
Developing
G03G 13/08
· ·
using a solid developer, e.g. powder developer
G03G 13/09
· · ·
using magnetic brush [2]
G03G 13/095
· · ·
Removing excess solid developer [6]
G03G 13/10
· ·
using a liquid developer
G03G 13/11
· · ·
Removing excess liquid developer, e.g. by heat [6]
for imagewise charging, e.g. photoconductive control screen, optically activated charging means (charging means controlled by electric image signals Fulltext... Hierarchy... Expanded...B41J) [6]
in which the powder image is formed directly on the recording material [6]
G03G 15/36
·
Editing, i.e. producing a composite image by copying one or more original images or parts thereof [6]
G03G 16/00
Electrographic processes using deformation of thermoplastic layers (layers for surface-deformation imaging Fulltext... Hierarchy... Expanded...G03G 5/022); Apparatus therefor [2,6]
G03G 17/00
Electrographic processes using patterns other than charge patterns, e.g. an electric conductivity pattern; Processes involving a migration; e.g. photoelectrophoresis, photoelectrosolography; Processes involving a selective transfer, e.g. electrophoto-adhesive processes; Apparatus essentially involving a single such process [5]
G03G 17/02
·
with electrolytic development [2]
G03G 17/04
·
using photoelectrophoresis [2]
G03G 17/06
· ·
Apparatus therefor [5]
G03G 17/08
·
using an electrophoto-adhesive process, e.g. manifold imaging [5]