Stock material or miscellaneous articles – Hollow or container type article – Glass – ceramic – or sintered – fused – fired – or calcined metal...
Patent
1993-06-23
1995-10-17
Loney, Donald J.
Stock material or miscellaneous articles
Hollow or container type article
Glass, ceramic, or sintered, fused, fired, or calcined metal...
527861, 5278613, E06B 324
Patent
active
054589436
ABSTRACT:
A spacer/seal for use in multi-pane glazing units, to provide a thermally non-conductive peripheral hermetic seal comprises a hollow tube of selected cross-sectional form, built up of a laminated construction of helically wound laminated layers and incorporating a layer or layers of gas impermeable barrier material to ensure long lived hermetic sealing characteristics. The construction may include respective layers wound to opposite hand, and layers wound to different lead angles. Also, the gas impermeable barrier layer or layers may be selected from materials that serve as adhesive to the laminated structure. Suitable barrier layers may be selected from polyvinyl alcohol, polyvinylidene chloride, thermoplastic polyesters, ethylene vinyl alcohol copolymers, and combinations thereof. The structure of the spacer lends itself to low-cost continuous manufacture on a tube-making machine having a rotating mandrel of selected cross-section onto which the layers of flexible web-substrate material are laminated, each as a continuous spiral wind, with continuous off-feed of the formed and laminated spacer/seal from the free end of the mandrel. Paper or light cardboard of suitable basis weight form a very suitable, low-cost fibrous web for spiral winding as the structural material upon which the hermetic sealing layer material may be readily coated. The method and materials of manufacture enable the provision of spacer/seals of novel shape. Larger size tubes made in accordance with the present invention may also be used for long term storage including freezer storage, where the capability of providing flat-walled containers of square or rectangular section in a virtually unlimited range of sizes ensures optimum space utilization, while the hermetic seal characteristics of the wall construction promotes long term storage without spoiling due to dehydration or atmospheric contamination. Also, the capability of long term retention of inner "storage" gases such as carbon dioxide, nitrogen, etc. is enhanced.
REFERENCES:
patent: 3655502 (1972-04-01), Yoshikawa
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