Abstract: A thermoplastic material created through a compounding process wherein the resulting material has a desired specific gravity to aid in separating lower specific gravity materials from those having a higher specific gravity. The present invention also pertains to a thermoplastic material or compound having properties that satisfy the performance requirements of mining operations and mine safety equipment. This material has an engineered density that causes it to sink during a purification process.

Abstract: A liquid containment vessel or pool having a wall constructed of thermoplastic polymers. Most pool walls are manufactured from steel or aluminum which are prone to deformation and corrosion. Polymer sheets or banding can be used to replace customary pool walls, offering a tough, strong, lightweight, corrosion resistant and easily installed material that can be manufactured from recycled plastics. When oriented, laminated, woven, corrugated, or layered, the strength of the polymer sheeting or banding increases further, allowing the present invention to be adapted for use in a variety of applications.

Abstract: A liquid containment vessel or pool having a wall constructed of thermoplastic polymers. Most pool walls are manufactured from steel or aluminum which are prone to deformation and corrosion. Polymer sheets or banding can be used to replace customary pool walls, offering a tough, strong, lightweight, corrosion resistant and easily installed material that can be manufactured from recycled plastics. When oriented, laminated, woven, corrugated, or layered, the strength of the polymer sheeting or banding increases further, allowing the present invention to be adapted for use in a variety of applications.

Abstract: A liquid containment vessel or pool having a wall constructed of thermoplastic polymers. Most pool walls are manufactured from steel or aluminum which are prone to deformation and corrosion. Polymer sheets or banding can be used to replace customary pool walls, offering a tough, strong, lightweight, corrosion resistant and easily installed material that can be manufactured from recycled plastics. When oriented, laminated, woven, corrugated, or layered, the strength of the polymer sheeting or banding increases further, allowing the present invention to be adapted for use in a variety of applications.

Abstract: A window apparatus includes a jamb assembly and a pair of window frame assemblies which are capable of sliding relative to the jamb assembly for the purpose of opening and closing and also tilting inwardly to facilitate cleaning. Locking members are provided on the upper corners of each of the window frames. The locking members are lodged in slots formed in the window frames and project beyond the window frames to engage the jamb assembly and prevent tilting of the window frames. The locking members have a relatively low level of stress when the window apparatus is subjected to wind loads, thereby enabling the window apparatus to withstand relatively high wind loads encountered on the upper floors of large buildings.