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GLASS COOK-TOP Disclosure Number: IPCOM000198375D
Publication Date: 2010-Aug-05
Document File: 3 page(s) / 226K

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The present invention relates to an all glass cook-top. A radiant heat range or an induction heat range cook-top made of a single piece of glass is disclosed, in which the glass is first slump molded and then heat-treated. The resulting piece of slump molded glass would have one or more of the following features: water catchments area, front lip, flat cook-top surface, back splash, control panel surface, and edges that fold over the sides. The slump molded and then heat-treated glass provides a single surface, thus resulting in a cook-top that is easier to clean.

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Page 1 of 3




The present invention relates generally to appliances, and more particularly to a glass cook-top.

Typically, radiant and induction cook-tops are inserted into a metal frame. The metal frame is part of the outer case of the oven. Generally, spacers are used to position the cook-top to ensure that there is a gap between the glass and the metal. Conventional methods use Room Temperature Vulcanizing (RTV) to adhere a piece of glass in a cook-top. RTV sealant is applied prior to the glass being inserted. Another RTV bed is applied after the glass is inserted. The RTV is pressed into the gap and the excess RTV is subsequently removed. The glass piece is then cleaned and dried.

There are several disadvantages of the conventional methods. Such conventional methods of fixing the glass piece using RTV are labor intensive and typically require rework of about 20%. Further, if the RTV is not applied properly, the glass has voids and water leak paths. Metal is used to draw material around the upper corners to form a water seal, and the cost of metal is high. Furthermore, individual components need to be connected together causing lean manufacturing issues, higher cost, higher assembly labor and lower reliability. Additionally, due to the mating components, grime accumulates between the components and food accumulates in the RTV groove after use.

Therefore, it is desirable to have a cook top that is made of a single piece of glass.


Figure 1 is an exemplary embodiment of a single piece glass top for a freestanding double drawer oven range in accordance with the present invention.

Figure 2 is an exemplary embodiment of a single piece glass top for a slide-in electric range in accordance with the present invention.


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A radiant heat or an induction heat cook-top made of a single piece of glass is disclosed, in which the glass is slump molded and then heat-treated.

Slump molding involves heating a flat glass to a temperature close to its melting point and then allowing the flat glass to be formed (slumped and pushed) around a mold shape. A two-cavity mold is used for molding the glass. The...