Abstract: A head rod is for mounting a roll-up window blind in a window frame. The head rod has two tubular rods slidably mounted with one another. An elongated is formed throughout the entire bottom of the first tubular rod. A first window blind panel is secured to the first tubular rod and a second window blind is secured to the second tubular rod and extending downward through the bottom slot formed in the first tubular rod. A fixed length inner rod or a telescopic inner rod is slidably mounted in the first and second tubular rods. The telescopic inner rod can be adjusted in length for mounting the blind in windows of various inner widths.

Abstract: A portable roll up window blind has an adjustable length and is removably mountable within the frame of a window. The blind has shell housing of an adjustable length and a telescopic winding core mounted between two end plates of the shell housing. One of the end plate is slidable and adjustable by a wedging means for pressing against the adjacent side wall of the window frame so that the two end plates cooperate with one another to secure the blind at a selected position in the window frame. The window blind panels are wound on the winding core in an overlapping manner. The winding core has one end engage with a round support pin located on the inner surface of the one end plate, and the other end engaged with a rotary shaft having a multi-sided cross sectional shape. The rotary shaft is rotatable by a pull chain for raising or lowering the window blind panels.

Abstract: A portable roll up window blind has an adjustable length and is removably mountable within the frame of a window. The blind has shell housing of an adjustable length and a telescopic winding core mounted between two end plates of the shell housing. One of the end plate is slidable and adjustable by a wedging means for pressing against the adjacent side wall of the window frame so that the two end plates cooperate with one another to secure the blind at a selected position in the window frame. The window blind panels are wound on the winding core in an overlapping manner. The winding core has one end engage with a round support pin located on the inner surface of the one end plate, and the other end engaged with a rotary shaft having a multi-sided cross sectional shape. The rotary shaft is rotatable by a pull chain for raising or lowering the window blind panels.

Abstract: A unique window blind system has two triangular panels. Each panel has a plurality of foldable sections bundled together at one fixed end and the remainder portion are unfoldable to cover a diagonally opposite triangular half portion of the window opening. The panels are mounted in the window frame in an inverted manner relative to one another with the fixed end adjacent to diagonally opposite corners of the window frame. Pull cords are provided for folding the sections in a fanfold manner to obtain selectively an opening covering partially or completely the window opening. Additional pull cords are provided for unfolding the sections of the two panels to cover selectively the window opening partially or completely from the opened state.