Abstract: A window covering has a plurality of shade elements, each having a first longitudinal edge and a second longitudinal edge. The shade elements are positioned sequentially below a headrail, and each shade element is made of a window covering material that can be rolled about the first longitudinal edge. A first rail extends from the headrail past the first longitudinal edge of each shade element and is connected to lowermost shade element or the bottom rail. A second rail extends from the headrail and is attached to lowermost shade element or the bottom rail and to the second longitudinal edge of each shade element. Rungs extend between the first rail and the second rail such that there is one rung below and corresponding to each shade element. The first longitudinal edge of each shade element rests upon a corresponding rung when the window covering is in a closed position. A control mechanism is connected to the first rail and is capable of moving the first rail relative to the second rail.

Abstract: A control device for Venetian blinds and a control method includes a position unit, a rope-control unit and a movement limit unit. The position unit is fixed in an upper rail. The rope-control unit consists of a wind wheel, a rope, an engage wheel and a clutch. The wind wheel is pivotally connected to the position unit, and the rope has one end fixed with the wind wheel and the other end hanging down for a user to handle. The rope rotates the wind wheel, and the engage wheel fits with the wind wheel and fixed with the hanging unit. The clutch is connected with and can be rotated by the wind wheel in a first direction, or the wind wheel and the engage wheel does not rotate together in case of rotation in a second direction. The movement limit unit has a lever member swung by the rope to engage with or disengage from the ratchet for the hiding unit to rise up or move down and be positioned stably.

Abstract: A method of cutting a cellular shade and a cutting machine thereof mainly applicable for cutting an assembled cellular shade to a certain size is provided. The cutting method includes providing an assembled cellular shade; providing a cutting machine having a sawing mechanism and a chopping mechanism; pulling out beams of the cellular shade, such that the beams and a cellular piece are staggered, and performing a beam cutting operation; and pulling out the cellular piece, such that the cellular piece and the beams are staggered, and performing a cellular piece chopping operation. The cutting machine mainly includes a table with at least one cutting work area disposed thereon. Using the assembly feature of the cellular shade, the beams and the cellular piece are staggered for a small distance temporarily.

Abstract: A rolling mechanism includes a base frame fastened to a top side of a window and having a coupling flange, a roller rotatably mounted below the base frame for stationary rotation and having a locating groove on its periphery, and at least one constraint member having a coupling portion pivotally coupled to the coupling flange of the base frame and a constraint portion extending from the coupling portion for engaging the locating groove of the roller and further limiting the rotary direction of the roller to one direction only.

Abstract: A safe disengaging device for the pull cord of a blind includes a male support base and a female support base. The male support base is fixed on the upper frame of a blind and provided with a protruding clasping block having its upper side formed with an engage shoulder. The female support base has its lower end tied with a pull cord and its upper end extending upward to form an elastic member corresponding to the clasping block of the male support base and having its upper free end formed with an engage hook to be engaged on the engage shoulder. When the pull cord is drawn by an excessively great force, the elastic member will be disengaged from the engage block, and the female support base together with the pull cord will fall off, avoiding accidents caused by improper operation of the pull cord and elevating safety in use.

Abstract: A vertical curtain cutter includes at least a base and a mold cutting device fixed on the base, which consists of a clamper, a knife and a motor. The clamper has a stationary clamp block and a movable clamp block, and the stationary clamp block has a flat clamp surface at one side and a curved clamp surface at other side. As a result, the movable clamp block and the stationary clamp block can clamp between them the rolled curtain cloth or folded-up curtain cloth. The cloth is vertically inserted by reversing the flat surface and the curved surface of the stationary clamp block. The motor can drive the knife to shift towards the curtain cloth and cut it, so that the cutter is able to cut either rolled or folded-up curtain cloth into multiple curtain pieces.

Abstract: A window covering has a headrail, a plurality of lift cords extending from the headrail and a plurality of shade elements positioned sequentially below the headrail. Each shade element has two longitudinal edges which are substantially parallel to one another. A flap made of mesh fabric, a non-woven fabric or a film through which light may pass is attached to one or both longitudinal edges of the shade elements. The shade elements are positioned so that when the shade elements are in a closed position the lower edge of one shade element abuts the upper edge of an adjacent shade element and when the shade elements are in an open position, the lower edge of the at least one shade element is spaced apart from the upper edge of an adjacent shade element. The flap may or may not fully cover the gap between adjacent shade elements. A first cord is attached to one longitudinal edge of each shade element and a second cord is attached to the other longitudinal edge of each shade element.

Abstract: A window blind is constructed to include a headrail, a blind body suspended below the headrail, a linking mechanism mounted inside the headrail and having a power input device fastened pivotally with the headrail and an actuator rotatable with the power input device and connectable to the blind body, and a driving control mechanism. The driving control mechanism includes a suspension rod suspended from the headrail and a controller detachably coupled to the suspension rod for enabling the suspension rod to be driven by the controller to rotate the power input device and to further drive the actuator to move the blind body, causing the blind body to change the window shading status.

Abstract: A rotator, which is driven by an endless cord member to rotate, is used in a window blind for driving a roller of the window blind. The rotator includes a base having a shaft, a first clamping plate and a second clamping plate rotatably serially mounted on the shaft of the base for clamping the cord member therebetween, and an elastic biasing device provided between the base and one of the first and second clamping plates for urging the first and second clamping plates against each other.

Abstract: A collapsing and securing device of a lateral blind includes a lateral blind such as a winding blind, a Roman blind, or a cloth blind, and a number of positioning members fixed at least on one surface of the window curtain, and the positioning members can temporarily adhere, stick or attract each other to secure the lateral blind at one of many collapsed position in case the lateral blind is manually wound up, without using pull ropes with a pool as used in a conventional lateral blind for preventing potential dangers involved in conventional lateral blinds. The collapsed lateral blind can be expanded down manually with easiness and quickness, with the temporarily adhered, stuck or attracted together positioning members separated from one another with easiness.

Abstract: A combination window covering is constructed to include a headrail, a bottom rail, front and rear ladder tapes respectively vertically connected between the headrail and the bottom rail at front and rear sides, fabric slats arranged in parallel between the headrail and the bottom rail, each slat having two opposite long sides respectively embedded with a rib, which is fastened to the front and rear ladder tapes, fabric light screening flaps respectively suspended from the slats and forming a light screening face at the front side of the slats, and a control unit for operation by the user to lift or lower the bottom rail so as to further receive or extend out the slats, and to move the front ladder tapes and rear ladder tapes of the ladder tapes vertically in reversed directions so as to further tilt the slats.

Abstract: A fabric blind slat for a window blind includes a base fabric made from an opaque knitted fabric, two coil units respectively coupled to and extended along two opposite edges of the base fabric, and two supporting sleeves respectively enclosed inside the two coil units. The coil unit is knitted from a thread looped on a thread at the edge of the basic fabric. The supporting sleeve is a tubular member having two open ends for insertion of a rigid supporting member therein. The supporting sleeve is enclosed inside the coil unit at the time while the coil unit is formed by knitting.

Abstract: A cord member control device is mounted in a bottom rail of a Venetian blind to support a lift cord and a ladder tape of the Venetian blind. The cord member control device includes a pulley assembly holding a pair of wheels over which the lift cord passes, and a locating member extended from the pulley assembly and fastened to a mounting hole of the bottom rail to secure the pulley assembly to the bottom rail. The locating member has a recessed open chamber and a transverse through hole, which extends across the recessed open chamber for the passing of front and rear tapes of the ladder tape for enabling the front and rear tapes of the ladder tape to be fastened together in the recessed open chamber with a clip.

Abstract: A fabric window blind includes a head frame, a roller, an adjustment mechanism, slats, a bottom rail and a light-admitting shade. The roller is horizontally rotatably mounted inside the head frame. The adjustment mechanism has a control axle horizontally pivotally mounted inside the head frame below the roller, and two cord member sets having top ends connected to the control axle and bottom ends vertically downwardly suspended from the control axle. The slats are arranged at different elevations below the control axle. The slats each have two opposite lateral sides respectively joined to the cord member sets. The bottom rail is fastened to the bottom ends of the cord member sets below the slats. The shade has a first end fastened to the head frame, and a second end extended downwardly over the bottom rail and turned upwards toward the head frame and fastened to the roller.

Abstract: A method for cutting a window blind by using a cutting machine includes the step of (a) displaying data of the window blind on a display by reading a barcode provided at the window blind; (b) inputting the size of a window that is to be installed with the window blind and an installation mode of the window blind by selection, and then calculating and displaying on the display a size to be cut based on the data of the window blind and the size of the window and the installation mode selected; and (c) automatically controlling a positioning mechanism of the cutting machine to move to a predetermined position corresponding to the calculated size to be cut by a processor for stopping the window blind in a cutting position, and then controlling a cutting unit of the cutting machine to cut the window blind by the processor.

Abstract: A double-layer roller blind includes a first roller and a second roller horizontally arranged in parallel at the top side of a window, a first shade fastened with a top edge thereof to the first roller, a first bottom bar fastened to a bottom edge of the first shade, a second shade fastened with a top edge thereof to the second roller, and a second bottom bar fastened to a bottom edge of the second shade and suspended below the first bottom bar. The first bottom bar is provided with an insertion space through which the second shade is inserted such that the second shade is kept close to the first shade.

Abstract: A window blind includes a headrail, a bottom rail and a plurality of fabric slats arranged in parallel between the headrail and the bottom rail. Each fabric slat has two stiff support rods disposed at the two opposite long sides thereof. A plurality of ladder tapes are symmetrically connected between the headrail and the bottom rail and located respectively at the two opposite long sides of the fabric slats. Each ladder tape is formed of a plurality of strands by weaving and has a plurality of through holes in the netting structure thereof for the insertion of the support rods of the fabric slats so as to join the fabric slats to the ladder tapes between the headrail and the bottom rail at different elevations.

Abstract: An electromagnetic clutch-controlled electric blind is constructed to include a blind body formed of a headrail defining a receiving chamber, a set of slats, and a bottom rail, a power drive, the power drive including a reversible motor and electromagnetic clutch apparatus connectable to the motor, an amplitude modulation set coupled to the motor for rotation with the motor to lift/lower the slats to the desired elevation, a frequency modulation set coupled to the motor through the electromagnetic clutch apparatus and adapted for controlling tilting angle of the slats.

Abstract: A window blind cutting machine includes a machine base; two cutting units respectively disposed at two ends of the machine base, each cutting unit having a cutter movable along a respective cutting path across a longitudinal axis of the machine base for cutting off a part of the window blind carried on the machine base that protrudes over a respective reference line based on the cutting path, two measuring devices respectively disposed at an outer side of each cutting unit for measuring the part of the window blind that protrudes over the reference line, and two inner measuring rules arranged in parallel to the longitudinal axis and respectively extended in reversed directions from one cutting unit toward the other and having a respective true-zero disposed at the reference line, for measuring the length of the window blind from the reference line.

Abstract: A multipurpose blind cutting machine is constructed to include a machine base, a first cutter unit and a second cutter unit mounted on the machine base and stacked with each other. The first cutter unit has a circular cutting blade and a cutter drive adapted to rotate the blade and to move the blade in a direction substantially perpendicular to the feeding direction of a blank blind to be cut. The second cutter unit has a locating molds having a plurality of positioning through holes for the positioning of parts of the blank blind to be cut, a cutting-off tool, and a cutter drive adapted to move the cutting-off tool in a direction substantially perpendicular to the feeding direction of the blank blind. A control unit is adapted to selectively control the operation of the first cutter unit and the second cutter unit.