Abstract: Primary and secondary quench sections and radiant electrical heaters for a roller hearth glass tempering furnace having a roller track supporting the endless conveyor drive belts, and adjustable locators for conveyor roller spacing. At least the primary quench section includes high flow, low suction air cooling devices. The heating zone size may conform to the size of the glass part being treated. Optionally, the glass part may be reciprocated five inches or less in either direction while being heated or cooled. Fully adjustable roller and drive belt support systems control the horizontal plane of the track and thus maintain a more level conveyor bed. A unitized zone construction allows for future increase or decrease in product output, simply by installation of one or more heating zones and lengthening of drive belts. A wear-resistant, disposable Teflon and/or silicone axle can be used. The furnace incorporates soft, heat-resistant fabric belts which are Teflon and/or silicone rubber coated.

Abstract: A roller hearth glass tempering furnace having a roller track supporting the endless conveyor drive belts, and adjustable locators for conveyor roller spacing. The heating zone size conforms substantially to the size of the glass article being treated. The glass part is reciprocated approximately five inches or less in either direction while being heated or cooled. Fully adjustable roller and drive belt support systems control the horizontal plane of the track and thus maintain a more level conveyor bed. A unitized zone construction allows for future increase or decrease in product output, simply by installation of one or more heating zones and lengthening of drive belts. A wear-resistant, disposable Teflon and/or silicone axle can be used. The furnace incorporates soft, heat-resistant fabric belts which are Teflon and/or silicone rubber coated.