Package making – Interrelated or safety controls
Patent
1975-10-16
1977-06-21
Simpson, Othell M.
Package making
Interrelated or safety controls
53 14, 53 34, 53 36, 53133, 53170, 264 466, B65B 2300
Patent
active
040302679
ABSTRACT:
An object to be packaged is suspended in an upwardly open mold whose walls are formed with an array of throughgoing perforations and lined with a gas-pervious sheet. A similarly perforated and lined cover is placed over the mold and foamable polyurethane material is poured into the mold through an elastic hose-like conduit connected to a filling aperture on the mold cover. This material expands within the mold completely filling the space around the object and thereby forms a fitted package around the object. The gas-pervious sheet material lining the mold may be a plurality of synthetic-resin panels formed of parallel inner and outer walls spaced apart by parallel webs defining between the inner and outer walls a plurality of parallel passages. These inner and outer walls are formed with throughgoing perforations opening into the passages so that as the synthetic-resin material expands it passes through the perforations on the inner walls only and projects into the passages.
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patent: 2600265 (1952-06-01), Randall
patent: 2983963 (1961-05-01), Jodell et al.
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patent: 3641725 (1972-02-01), Grisell
patent: 3737266 (1973-06-01), Yamamoto
patent: 3844523 (1974-10-01), Wilheim
patent: 3932252 (1976-01-01), Woods
patent: 3941528 (1976-03-01), Cotterell
patent: 3952082 (1976-04-01), Arnaud
Culver Horace M.
Dubno Herbert
Ross Karl F.
Simpson Othell M.
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