Pull across roll up screen assembly

A screen assembly comprising:

• a flexible screen having a front edge area,
• a supporting member about which the screen can be wound/unwound and which is substantially vertical and has an upper end and a lower end,
• a biasing means associated with the supporting member to create a tension in the screen to bias the supporting member to a wound condition,
• a single drum/pulley only and on the upper end of the supporting member, the single drum/pulley is configured as a cone and comprising a first end and a peripheral circumference that tapers diametrically from the first end to a smaller second end, the smaller second end more proximate the screen and the cone configuration being aligned vertically with the supporting member from the second end to the first end of the single drum/pulley,
• a line member that can be wound onto and off the single drum/pulley, the line member being operatively associated with the screen such that as the screen is extended, the line member is wound onto the single drum/pulley, and as the screen is retracted, the line member is wound off the single drum/pulley, the screen, when wound about the supporting member, having a diameter which increases as the screen material is wound about supporting member, and which decreases as the screen material is unwound from the supporting member, the line member comprising:
• a first part which winds onto and off the single drum/pulley,
• a second part which is attached to the first part via a joiner block, the second part being operatively connected to an upper front edge area of the flexible screen, and
• a third part which is attached to the first part via the joiner block, the third part being operatively connected to a lower front edge area of the flexible screen,
• the diameter of the single drum/pulley, at the position where the line member winds onto the single drum/pulley or off the single drum/pulley, being about the same diameter of the supporting member containing the screen,
• the line member being operatively attached to the front edge area of the screen,
• a joiner block for combining two portions of the line member, the line member is configured such that the joiner block moves in an opposite direction to the direction of movement of the front edge area of the flexible screen, the joiner block for mounting the second part and the third part to the first part, and
• at least one return pulley for guiding the second part and the third part around the at least one return pulley;
• and
• a pair of balancing biasing means to create a balanced tension in the substantially vertical screen, a first balancing biasing means mounted to the front edge area of the screen at a first mounting point and attached to the second part of the line and a second balancing biasing means mounted to the front edge area of the screen at a second mounting point and attached to the third part of the line, the pair of biasing means independent of one another so that together, the pair of balancing biasing means balances the tension in the screen.

A screen assembly comprising:

• a supporting member extending vertically;
• a flexible screen having a front edge area, the flexible screen being secured to the supporting member in a configuration to allow the screen to be selectively wound and unwound over the supporting member;
• a drum configured as a cone, the cone comprising a first end and a peripheral circumference that tapers diametrically from the first end to a smaller second end, the drum is secured to the supporting member with the smaller second end more proximate the screen and the cone configuration being aligned vertically with the supporting member from the second end to the first end of the drum, the drum being the only drum secured to the supporting member;
• and
• a line member operatively secured between the drum and the screen in a configuration that allows the line member to be wound and unwound over the drum during the selective unwinding and winding of the screen, the line member comprising:
• a first part which winds onto and off the drum,
• a second part which is attached to the first part via a joiner block, the second part being operatively connected to an upper front edge area of the flexible screen, and
• a third part which is attached to the first part via the joiner block, the third part being operatively connected to a lower front edge area of the flexible screen;
• a joiner block for combining the second and third parts of the line member, the line member being configured such that the joiner block moves in an opposite direction to the direction of movement of the front edge area of the flexible screen, the joiner block mounting the second part spaced apart and parallel from the third part, and
• at least one return pulley having a radially outer guide for the third part and a radially inner guide for the second part to maintain the second part spaced apart, and parallel to, the third part around the at least one return pulley.