Photocopying – Projection printing and copying cameras – With developing
Patent
1990-06-26
1991-10-22
Hayes, Monroe H.
Photocopying
Projection printing and copying cameras
With developing
271 33, G03B 2732
Patent
active
050600095
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a method and apparatus for automated image formation on any photographic medium.
Generally, numerous techniques have already been proposed for such formation, among which will only be mentioned:
the technique of instantaneous photography with reduced format, using relatively simple mechanisms; and
techniques used by development laboratories for professional use (central photographic laboratories, automatic photographic mini-laboratories, automatic apparatus for identity photos, machines, colour photocopiers on photographic paper), these machines using relatively complex and expensive mechanisms, such as rollers, gears etc.
According to these techniques for professional use, the sensitive paper is delivered in the form of rolls, which involves the use of a mechanism for advancing the paper and cutting to the format, an exposure system operating while the paper is stopped, etc.
Solutions have also been proposed, particularly by the international patent application PCT/FR 88/00336, filed in the names of the Applicants, for automated photographic image formation by machines with reduced mechanisms, in which the displacements of the sensitive surfaces from one treatment station to another are effected by means of a transporter belt on which the photographic sensitive surfaces are held by temporary adhesion. According to the above patent, this temporary adhesion is obtained by means of a permanent adhesive covering said photographic medium at least partially, or even by suction means equipping the belt. Thus, it is possible to solve in a particularly simple way the problem of movement of the sensitive medium inside the apparatus, the medium consisting either of photographic films or papers with a sensitive photographic surface. This simplification is increased by at least one of the following devices:
the use of a flash for exposing the sensitive surfaces;
the use of a transporter belt, enclosed initially inside cartridge, and on which the sensitive surfaces are previously disposed and adhere, as well possibly as containers containing the treatment products to be used;
the use of means for vaporizing the chemical treatment on the sensitive surfaces;
the use of a photographic apparatus associated with a light source for printing the sensitive surfaces.
In the above patent, the sensitive surfaces are in contact with lower rollers (emulsion against the rollers) and therefore, under the effect of too high a pressure, an impurity may penetrate into the photographic emulsion, which may be troublesome in the search for very high quality and the use of very high temperatures, or the delivery of prints in ultra short times. Furthermore, in the case of a prolonged stoppage of the machine, at night for example, adhesive may be deposited on the lower rollers. Finally, in the case where the paper is made adhesive on its back and the transporter belt non adhesive, at the output of the machine a self-adhesive photograph is obtained, which is not always desirable.
The purpose of the invention is then more particularly not only to solve the above outlined problems but further to increase the performances and extend the fields of application of apparatus using the principle of transfer by transporter belt with temporary adhesion.
For this, it provides a method for the automated formation of images on photographic media, in which the photographic medium is transported from one treatment station to another by means of a transporter belt on which said medium is held by temporary adhesion by adhesive means, the medium then being extracted from the belt by means of an extractor.
According to the invention, this method is characterized in that said adhesive means have, with respect to the belt, an adhesive power different from the adhesive power which it has with respect to the medium, so that during the extraction phase, the adhesive means remain either on the belt, or on the medium depending on the desired aim.
The adhesive means may be initially carried by the medium or by the belt. They will be adapted so a
REFERENCES:
patent: 3262697 (1966-07-01), Krinke
patent: 3857560 (1974-12-01), Gundlach
patent: 4185912 (1980-01-01), Schwartz
patent: 4461468 (1984-07-01), Peter et al.
Caisse Regional de Credit Agricole Mutuel de L'yonne
Drucker William A.
Hayes Monroe H.
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