Abstract: A single-hung tilt-to-clean window frame of otherwise standard configuration is furnished with a non-sliding upper sash and a vertically sliding lower sash with each sash having typical tilt-to-clean hardware. When the lower sash is opened and adjusted up/down, insect screen (331) attached to the bottom of the lower sash is dispensed from a self-storing roller unit (330) hidden inside the window sill, automatically filling the ventilation aperture. Thus, vision-restricting screening is out of sight until actually required. Also, the cold wind, muggy air or precipitation that can hinder cleaning operations are blocked by an impervious membrane (334) stretched over the window's opening, before cleaning begins, by way of a handle (343) attached to cables (340) pulling a rod (336) moving a tube (335) placed behind a fold in the membrane.

Abstract: A single-hung tilt-to-clean window frame of otherwise standard configuration is furnished with a non-sliding upper sash and a vertically sliding lower sash with each sash having typical tilt-to-clean hardware. When the lower sash is opened and adjusted up/down, insect screen (331) attached to the bottom of the lower sash is dispensed from a self-storing roller unit (330) hidden inside the window sill, automatically filling the ventilation aperture. Thus, vision-restricting screening is out of sight until actually required. Also, the cold wind, muggy air or precipitation that can hinder cleaning operations are blocked by an impervious membrane (334) stretched over the window's opening, before cleaning begins, by way of a handle (343) attached to cables (340) pulling a rod (336) moving a tube (335) placed behind a fold in the membrane.

Abstract: A hidden insect screen system for tilt-to-clean, double hung windows whereby raising the bottom sash (104) causes resultant opening to fill with insect screen (115a) dispensed from an ordinary self-storing roller mechanism (114) mounted inside bottom rail (109) of said sash and whereby lowering the upper sash (105) causes resultant opening to fill with insect screen (115b) dispensed from an ordinary self-storing roller mechanism (122) mounted inside window head frame (103), all furnished such that vertical edges of the screens are protected from insect passage by contacting weatherstrip-like edge seals (127), and arranged such that insect protection is maintained with minimal interruption when each sash is tilted and its glazing is cleaned, the lower end of the upper screen being attached so as to be quickly repositioned from top to bottom of said upper sash.

Abstract: A hidden insect screen system for tilt-to-clean, double hung windows whereby raising the bottom sash (104) causes resultant opening to fill with insect screen (115a) dispensed from an ordinary self-storing roller mechanism (114) mounted inside bottom rail (109) of said sash and whereby lowering the upper sash (105) causes resultant opening to fill with insect screen (115b) dispensed from an ordinary self-storing roller mechanism (122) mounted inside window head frame (103), all furnished such that vertical edges of the screens are protected from insect passage by contacting weatherstrip-like edge seals (127), and arranged such that insect protection is maintained with minimal interruption when each sash is tilted and its glazing is cleaned, the lower end of the upper screen being attached so as to be quickly repositioned from top to bottom of said upper sash.