On-site fabricating of plastic pipe fittings
OwnerPaul R. DuPont, Craig R. Nelsoninventors
Life of this patent
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Abstract
A portable apparatus for reforming plastic pipe ends is disclosed. The apparatus includes a heat sink clamp and depth collar for locating said clamp a predetermined distance from the end of the plastic pipe end. This heat sink clamp substantially limits axial heat penetration from an oven into the plastic pipe so as to permit the reshaping of the pipe end into a sanitary flow end, i.e. an end having imperfection-free contours.
Claims7
A portable plastic pipe-end reforming apparatus comprising a planar table having mounted thereon an oven having a uniformly heated internal cavity for accommodating therein a range of different pipe diameters, segmented heat-sinking clamp means including a thermal barrier portion disposed opposite said oven cavity and a highly thermally conductive section for intimately embracing a predetermined length of said plastic pipe, said heat-sinking clamp means being adapted to sharply limit the axial heat penetration from said oven into said plastic pipe and a forming station having a die for embossing a sanitary flow pipe contour parting surface on said pipe end.
A portable apparatus for reforming the end of an originally extruding plastic pipe to the contours of a sanitary flow pipe section, comprising:
- a planar table having an oven including a uniformly heatable internal cavity,
- means including a heat sink clamp and depth collar for locating said clamp a predetermined axial length from the end of said plastic pipe,
- positioning means for introducing said predetermined axial length of said plastic pipe projecting into said oven cavity for the uniform relieving of extrusion-induced stresses in said pipe,
- and a forming station for embossing a sanitary flow pipe contour having a sharply defined parting surface (12f, 12g or 134, 13g) into said stress-relieved end portion of said pipe and for defining a sanitary flow external flange contour (22) on the external periphery thereof.
Dependencies are inferred from the claim text.