RADIOGRAPHIC SYSTEM
    1.
    发明申请
    RADIOGRAPHIC SYSTEM 审中-公开
    放射学系统

    公开(公告)号:WO1995015514A1

    公开(公告)日:1995-06-08

    申请号:PCT/EP1994003908

    申请日:1994-11-25

    CPC classification number: G03C5/17

    Abstract: The present invention concerns a radiographic system comprising at least one X-ray intensifying screen and a radiographic film which is sensitive to actinic radiation. The X-ray intensifying screen emits mainly ultraviolet radiation and the photosensitive film comprises a tabular-grain silver halide emulsion. Such a system enables very high quality radiographs to be obtained, even with a fast processing method.

    Abstract translation: 本发明涉及一种包括至少一个X射线增强屏和对光化辐射敏感的射线照相胶片的射线照相系统。 X射线增强屏主要发射紫外线辐射,感光膜包括片状银卤化银乳剂。 这样的系统即使采用快速的处理方式也能获得非常高质量的X光片。

    DEVICE FOR PRESSURE SUPPLYING A PHOTOGRAPHIC COATING STATION
    4.
    发明申请
    DEVICE FOR PRESSURE SUPPLYING A PHOTOGRAPHIC COATING STATION 审中-公开
    压力供应摄影涂装机的装置

    公开(公告)号:WO1992010786A1

    公开(公告)日:1992-06-25

    申请号:PCT/FR1991000955

    申请日:1991-12-02

    CPC classification number: G03C1/74 B05C11/1002 B05C11/101

    Abstract: The device for supplying under pressure a photographic coating station is comprised of a first reservoir intended to receive a given volume of photographic emulsion, said reservoir being connected to an air reservoir whose pressure is maintained constant by appropriate means, the volume of said air reservoir being much larger than the volume of the first reservoir so as to absorb substantially the relative variations of pressure related to the emulsion volume variations. Application to the coating of photographic products.

    STRIP MATERIAL DISPENSER
    7.
    发明申请
    STRIP MATERIAL DISPENSER 审中-公开
    条纹材料分配器

    公开(公告)号:WO1991011383A1

    公开(公告)日:1991-08-08

    申请号:PCT/FR1991000073

    申请日:1991-02-04

    CPC classification number: G03B17/30

    Abstract: A dispenser (1) comprising a core (10) to which one end of a strip material (15) is attached with a leader (14). The core defines two parallel spindles, a first spindle (11) on which the leader is wound, and a second spindle (12) on which the strip material is wound. The two spindles are separated so that once the strip material has been completely unwound, said leader remains wound onto said first spindle and does not come out of the dispenser. The dispenser can be used for packaging light-sensitive products.

    FACETTED NODULAR PARTICLES, THEIR PREPARATION AND USE
    9.
    发明申请
    FACETTED NODULAR PARTICLES, THEIR PREPARATION AND USE 审中-公开
    无定形颗粒,其制备和使用

    公开(公告)号:WO1986005026A1

    公开(公告)日:1986-08-28

    申请号:PCT/EP1986000052

    申请日:1986-02-01

    Abstract: Very small iron-containing particles that are in the shape of facetted nodules. Such particles can be non-magnetic particles such as delta ferric oxide hydrate particles or magnetic particles such as magnetic iron oxide particles or metallic particles. Magnetic layers containing such magnetic particles combine excellent remanent magnetization with increased output signal level. The facetted nodular particles are prepared in a process in which (a) an aqueous solution of ferrous salt is added to an aqueous solution of alkaline hydroxide while avoiding substantial local excesses of the ferrous salt, and subjecting the ferrous salt solution to reducing conditions before or during its addition to the alkaline hydroxide solution and (b) the ferrous hydroxide particles are oxidized to delta ferric oxide hydrate particles in the presence of an iron complexing agent, for example, pyrogallol, that is capable of selectively forming ferric iron complexes that are soluble in the reaction medium. The use of the iron complexing agent in this process provides delta ferric oxide particles rather than alpha ferric oxide particles which are normally obtained in processes of this type. The delta ferric oxide hydrate particles are converted to facetted nodular magnetic particles by appropriate heat treatments.

Patent Agency Ranking