Heat insulating box structure and manufacturing me

专利名称：Heat insulating box structure and

manufacturing method therefor

发明人：Toshiaki Kubota,Hiroshige Hayashi,Yoshirou

Ishizaka,Hiroshi Naganuma,Zenichi Kakinuma

申请号：US07/509965申请日：19900416公开号：US05061019A公开日：19911029

摘要：A heat insulating structure having a lower case whose top surface is arranged tobe an opening through which goods are inserted and withdrawn and an upper case whosefront surface is arranged to be an opening through which goods are inserted andwithdrawn, the upper and lower cases each being formed by inner and outer boxesleaving a gap therebetween the heat insulating structure comprising: two pour holesformed in a wall of the upper case; a passage for establishing communication betweenthe gaps of the upper case and the lower case; a heat insulating pipe having an endportion communicating with one of the pour holes of the upper case and extending fromthe one pour hole and through the gap of the upper case and having its other endportion communicating with the gap of the lower case; foam heat insulating material isinjected, in the form of a foaming agent, through the other pour hole of the upper caseto the gap of the upper case so as to foam and solidify; and foam heat insulating materialin the form of a foaming agent is also injected through the pour hole of the upper caseand through the pipe to the gap of the lower case to foam and solidify.

申请人：SANYO ELECTRIC CO., LTD.

代理机构：Darby & Darby

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