发明名称 |
MICROWAVE OVEN DOOR SCREEN |
摘要 |
<p>MICROWAVE OVEN DOOR SCREEN A structure of a microwave oven door screen which facilitates the observation of the inside of a heating cavity and enhances the safety against the electromagnetic wave leakage and durability. A door screen of this type generally comprises a pair of transparent plates and an electromagnetic wave shielding material interposed therebetween. The present door screen uses a punched metal plate as the electromagnetic shielding material made of aluminum having a thickness of 0.1 to 0.35 mm, an aperture diameter of 1.2 mm or less and a ratio of the aperture diameter to a center-to-center distance of an apertures of 0.67 to 0.85, these parameters being chosen such that an aperture rate of more than 40% is assured and the electromagnetic wave leakage through the door screen is effectively prevented (to meet the Regulations of U.S. Department of Health, Education, and Welfare) and a strain due to continuous mechanical treatment of the punched metal plate is minimized.</p> |
申请公布号 |
CA1040716(A) |
申请公布日期 |
1978.10.17 |
申请号 |
CA19760252669 |
申请日期 |
1976.05.17 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
TANAKA, JUNZO;KAI, TOSHIO |
分类号 |
H05B6/76;(IPC1-7):24C7/02 |
主分类号 |
H05B6/76 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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