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    • 2. 发明授权
    • Portable tray warming unit
    • 便携式托盘升温单元
    • US4041277A
    • 1977-08-09
    • US697356
    • 1976-06-18
    • George ShumrakAnthony Mack
    • George ShumrakAnthony Mack
    • A47J39/00F24C7/10H05B1/02F27D11/02
    • H05B1/0252A47J39/006F24C7/10
    • A portable tray warming unit comprising a casing having at least one tray supporting rack, trays to be supported and received upon said rack, and electrical terminal means for interconnecting the tray warming unit with an external electrical source of energy. The casing of this tray warming unit has dimensions and weight small enough so that the unit may be easily carried about or lifted. The upper and lower surfaces of the casing lie in planes parallel to each other so that one unit may be stacked on top of another. To further facilitate such stacking the bottom surface of a unit has protrusions extending downwardly from the bottom and these protrusions correspond to indentations in the top surface of the casing. This correspondence allows the protrusions of one unit to fit into the indentations of the unit on which it is stacked thereby assuring a non-slidable connection between the two units.
    • 一种便携式托盘升温单元,包括具有至少一个托盘支撑架的壳体,待支撑并容纳在所述支架上的托盘以及用于将托盘升温单元与外部电能源相互连接的电气端子装置。 该托盘升温单元的外壳具有足够小的尺寸和重量,使得该单元可以容易地携带或提升。 壳体的上表面和下表面位于彼此平行的平面中,使得一个单元可以堆叠在另一个单元的顶部上。 为了进一步促进这种堆叠,单元的底表面具有从底部向下延伸的突起,并且这些突起对应于壳体顶表面中的凹陷。 该对应关系允许一个单元的突起装入其堆叠的单元的凹槽中,从而确保两个单元之间不可滑动的连接。