Combined mould element and sealing ring
AssigneeRieber & Son Plastic-Industri A/S
InventorGunnar Parmann
Life of this patent
Estimating the term…
Abstract
Combined mould element and sealing ring suitable for sealing off a joint between a socket end and an insert end of two cooperating pipes formed from thermoplastic material and for being used as a portion of a body of a mould for both fabricating the socket end of the one pipe and simultaneously inserting the ring in an internal groove in the socket end produced thereby. The main bulk of the sealing ring is composed of elastically yielding material having within its contour at least one zone composed of relatively non-elastic material capable of rendering the zone stable as regards its shape compared with the remainder of the ring. Conveniently, such zones are formed by stiffening rings permanently connected to the main bulk of the sealing ring.
Claims32
A combined mould element and sealing ring, suitable
- for sealing off a joint between a socket end and an insert end of two cooperating pipes formed from thermoplastic material
- and for being used as a portion of a body of a mould for both fabricating said socket end of the one pipe and simultaneously inserting said ring in an internal groove in the socket end produced thereby,
- said combined mould element and sealing ring having inner and outer surfaces defining therebetween a unitary body,
- the main bulk of said body being composed of elastically yielding material,
- whereas said body has within its contour at least one zone composed of relatively non-elastic material capable of rendering said zone stable as regards its shape compared with the remainder of said body.
A combined mould element and sealing ring comprising
- a body of elastically yieldable material, said body having a first inner surface portion, a convex inner surface portion and a concave inner surface portion between said first and said convex inner surface portions, and an obliquely extending outer surface portion forming a leading edge with said first inner surface portion;
- and
- a rigid relatively non-elastic member disposed in said body in said outer surface portion.
A combined mould element and sealing ring comprising
- a body of elastically yieldable material, said body having a first inner surface portion, a second inner surface portion, a recessed inner surface portion between said first and second portions, and an outer surface portion;
- and
- a rigid relatively non-elastic member disposed in said body at said outer surface portion.
A combined mould element and sealing ring comprising
- a body of elastically yieldable material, said body having a first inner surface portion, a second inner surface portion, a recessed inner surface portion between said first and said second inner surface portions, and an outer surface portion;
- and
- at least one rigid non-elastic member disposed in said body.
A combined mould element and sealing ring comprising
- a body of elastically yieldable material, said body having a first inner surface portion, a second inner surface portion, and a recessed inner surface portion between said first and second portions, and an obliquely outer surface portion forming a leading edge with said first inner surface portion;
- and
- a rigid relatively non-elastic member disposed in said body.
A combined mould element and sealing ring comprising
- a body of elastically yieldable material, said body defining between outer and inner surfaces a mainly drop-shaped cross-section;
- and
- at least one rigid relatively non-elastic member disposed in said body.
Dependencies are inferred from the claim text.