Illuminating system for a copying machine专利检索-原始图像文件电脑编程专利检索查询-专利查询网

Illuminating system for a copying machine

阅读：674发布：2023-02-05

专利汇可以提供Illuminating system for a copying machine专利检索，专利查询，专利分析的服务。并且An illuminating system for use in a copying machine to illuminate an original document to be copied and project an image thereof to an exposure plane includes a light chamber having a diffusedly reflective interior surface. The chamber comprises an upper portion having along the upper wall thereof an object window for receiving the original document, and an open ended lower channel portion joined at one end to the lower wall of the upper chamber portion in alignment with an aperture in the latter. A lens is mounted at the free, open end of the lower channel portion, and a pair of lamps are mounted in the upper chamber portion at the sides of the object window outside the field of view of the lens to prevent rays reflected directly from the object window from passing through the lens. The lower wall of the upper chamber reflects rays from the lamps which would otherwise pass through the lens, and is spaced a predetermined distance from the upper wall to fully and uniformly illuminate the original receiving object window with light reflected therefrom.，下面是Illuminating system for a copying machine专利的具体信息内容。

权利要求

1. In a copying machine for producing copies of an original document on light sensitive copy material, an illumination system for illuminating said document to project an image thereof to an exposure plane for the purpose of imaging light sensitive copy material located thereat, said illumination system comprising: a light reflecting chamber having an upper chamber portion formed by upper and lower horizontally extending walls and vertically extending supporting walls, and having a rectangular cross section, the interior surface of said walls being diffusedly reflective to visible radiation, said upper and lower walls each including an aperture therein, said apertures being aligned with respect to each other and the aperture in said upper horizontal wall having a specular reflective, transparent platen mounted therein for receiving said original to be copied, a lower channel-like chamber portion having a cross sectional area less than said upper chamber portion and apertures at opposing ends thereof, the interior surface of said lower chamber portion also being diffusedly reflective to visible radiation, said lower chambEr portion being joined at a first end with said upper chamber at said lower wall with the apertures of said chamber portions being in alignment to provide communication between said chamber portions, lens means mounted at the free end of said channel portion for projecting an image of an original document placed on said platen to said exposure plane, thereby to image said light sensitive copy material positioned thereat, the field of view of said lens means including said platen, and a pair of elongated lamps mounted within said first chamber portion directly beneath and at opposite sides of said platen outside the optical field of view of said lens means to prevent rays from said lamps from passing directly through said lens means thereby to minimize glare at said exposure plane, said lower wall of said upper chamber portion spaced a predetermined distance from said upper wall to provide maximum and uniform illumination of said original receiving platen by light rays reflected from said lower wall, said aperture in said lower wall of said upper chamber portion dimensioned to permit the surrounding lower wall portion to intercept and reflect light rays emanating from said elongated lamps which would otherwise pass directly through said lens, said channel-like member portion having a pyramidal shape and including a pair of opposing side wall members extending substantially in the direction of said exposure plane converging towards said lens means and the remaining interconnecting opposing walls extending substantially in vertical planes substantially perpendicular to the exposure plane and the wall furthest from said exposure plane includes a non-reflective area to prevent light rays which would normally be reflected therefrom to said exposure plane thereby preventing said light rays from impinging on said exposure plane.

2. An illumination system as claimed in claim 1 wherein said exposure plane is mounted in a substantially vertical plane spaced from said chamber and wherein said system includes mirror means mounted optically between said lens means and said exposure plane for reflecting an image of said original projected by said lens means to said exposure plane.

3. An illumination system as claimed in claim 1 wherein said non-reflective area includes an aperture in said wall through which heat from said lamps is dissipated.

4. An illumination system as claimed in claim 1 wherein said lamps are of the gaseous discharge type.

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Illuminating system for a copying machine

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