US 4,732,553 A · Seal construction for a mold structure for encapsulating glass with a gasket

Abstract

A unique dynamic seal assembly is used in a mold structure for encapsulating a glass window assembly with a gasket. The seal assembly resiliently supports the window assembly and cooperates with the mold structure for defining a gasket forming cavity. The mold structure typically includes two cooperating mold sections, each of which can be provided with a groove for receiving a separate dynamic seal assembly. Each seal assembly includes a sealing body having a sealing surface which faces and is adapted to sealingly contact the window assembly. The seal assembly also includes a first fluid filled bladder positioned between the sealing body and a bottom of the groove in the mold section. When increased pressure is applied to a local area of the seal as a result of a contour difference between the seal and the window assembly, the bladder deforms to automatically transfer at least a portion of the applied pressure to adjacent areas of the seal. A second fluid filled bladder is positioned between the sealing body and a side wall of the groove to force the sealing body against the opposite side wall of the groove. The sealing body can be provided with a strip of Teflon material for sealing against the side wall of the groove.

Claims24

Dependent claims

A seal assembly for a mold for encapsulating at least a portion of a window assembly with a gasket forming material comprising;

sealing means having a first surface adapted to contact a window assembly and a second surface opposite said first surface;
a first bladder means in contact with said second surface of said sealing means whereby when said sealing means and said first bladder means are positioned in a groove in a mold and said first bladder means is inflated and pressure is applied in a local area of said first surface, said bladder means automatically deforms to transfer at least a portion of said pressure to an adjacent area of said first surface of said sealing means;
said sealing means having a third surface generally perpendicular to said first surface adapted to contact a wall in a mold and a fourth surface opposite said third surface;
and
a second bladder means in contact with said fourth surface of said sealing means whereby when said sealing means and said second bladder means are positioned in a groove in a mold and said second bladder means is inflated, said third surface of said sealing means cooperates with said wall of the mold to seal against passage of gasket forming material.

2 more elements

A seal assembly for use in a mold for encapsulating the periphery of a window assembly with a gasket forming material, the seal assembly comprising:

a sealing body formed as a ring adapted to be retained in a groove in a mold and having a first sealing surface adapted to contact a surface of a window assembly, said sealing body cooperating with a mold for defining an encapsulation gasket forming cavity;
a first bladder means spaced from said first sealing surface and adapted to be positioned in the mold whereby when said first bladder means in inflated and pressure is applied in a local area of said first sealing surface, the pressure is transmitted through said sealing body to deform said first bladder means and transfer at least a portion of the pressure to an adjacent area of said first sealing surface;
said sealing body having a second sealing surface adjacent said first sealing surface and adapted to contact a side wall of a groove formed in the mold;
and
a second bladder means spaced from said second sealing surface whereby when said second bladder means is inflated, said second sealing surface is forced into contact with a side wall of a groove in the mold to prevent gasket forming material in the mold from flowing past said sealing body.

2 more elements

Dependencies are inferred from the claim text.

Seal construction for a mold structure for encapsulating glass with a gasket

Life of this patent

Seal construction for a mold structure for encapsulating glass with a gasket

Life of this patent

Abstract

Claims24