Front cover assembly for a touch sensitive device

A method of making a front cover assembly using an injection molding technique comprising the steps of:

• inserting a piece of glass along with the top cover in a mold wherein said glass and said top cover ar held in place relative to each other by a vacuum;
• injecting polyurethane into said mold between said glass and said top cover to create an integral bezel forming a mechanical lock and a liquid proof seal between said glass and said top cover;
• said bezel compensating for different rates of expansion and contraction of the top cover and glass in maintaining the mechanical lock and liquid seal;
• and
• tab members formed in the bezel providing a small gap between the touch sensitive device and the glass to reduce bleeding or puddling of the touch sensitive device when a touch force is applied to the glass.

A display tablet comprising:

• a front cover assembly having a top cover, a piece of tempered glass, and a bezel for securing said glass to said top cover wherein said bezel is formed by injection molding technique wherein polyurethane is injected between said tempered glass and said top cover while said tempered glass and said top cover are held in place relative to each other, wherein said bezel forms a mechanical lock between the top cover and the glass that provides a liquid tight seal;
• said bezel compensating for different rates of expansion and contraction of the top cover and glass in maintaining the mechanical lock and liquid seal;
• tab members formed in the bezel providing a small gap between the touch sensitive device and the glass to reduce bleeding or puddling of the touch sensitive device when a touch force is applied to the glass;
• a touch ring disposed around said bezel of said front assembly, said touch ring for forming an infrared grid over said glass of said front cover assembly;
• a touch controller coupled to said touch ring for controlling said touch ring and providing touch input coordinates;
• a liquid crystal display disposed next to said glass of said front cover assembly;
• a frame surrounding the liquid crystal display and receiving touch forces transferred thereto by the tab members;
• and
• a rear front cover assembly mated to said front cover assembly wherein said touch ring, said liquid crystal display, and said touch controller are disposed therein.

A computer system comprising:

• a system unit;
• a touch sensitive device having an infrared touch input device and a LCD;
• a front cover assembly having a top cover with inner edges describing an opening in said top cover, said top cover made of a polycarbonate material;
• a piece of glass that fits within said opening in said top cover;
• and an infrared bezel for securing said glass to said top cover wherein said infrared bezel is formed by an injection molding technique wherein polyurethane is injected between said glass and said top cover while said glass and said top cover are held in place, wherein said bezel forms a mechanical lock between the top cover and the glass that provides a liquid tight seal;
• said bezel compensating for different rates of expansion and contraction of the top cover and glass in maintaining the mechanical lock and liquid seal;
• tab members formed in the bezel providing a small gap between the touch sensitive device and the glass to reduce bleeding or puddling of the touch sensitive device when a touch force is applied to the glass;
• and
• a frame surrounding the LCD and receiving touch forces transferred thereto by the tab members.

A front cover assembly for an infrared touch sensitive device comprising:

• a top cover having inner edges describing an opening in said top cover, said top cover made of a polycarbonate material;
• a piece of glass that fits within said opening in said top cover;
• an infrared bezel for securing said glass to said top cover wherein said infrared bezel is formed by an injection molding technique wherein polyurethane is injected between said glass and said top cover while said glass end said top cover are held in place relative to each other, wherein a liquid tight seal is created between said glass, said top cover and said infrared bezel;
• said bezel being a unitary member compensating for different rates of expansion and contraction of the top cover and glass in maintaining the mechanical lock and liquid seal;
• tab members formed in the bezel providing a small gap between the touch sensitive device and the glass to reduce bleeding or puddling of the touch sensitive device when a touch force is applied to the glass;
• and
• a frame surrounding the touch sensitive device and receiving touch forces transferred thereto by the tab members.