Abstract: A cassette blind with a weighting profile at the lower end of a set of blinds and a blind drive, in which coupling elements with a winding shaft mounted in the cassette profile. Complementary coupling elements with a drive member and complementary coupling elements at a pin which can be stationarily fastened are arranged, wherein coupling elements of the drive member and of the winding shaft mutually engage each other during a rotary movement of the drive member in the winding-up direction of the blinds, and coupling elements of the winding shaft and of the pin mutually engage each other in the opposite direction. The coupling elements at the winding shaft are arranged rotatably over a predetermined angle against spring action in the winding-up direction of the blinds in order to achieve a torsionally elastic tensioning of the weighting profile at the cassette profile at the end of the winding-up movement of the blinds.

Abstract: A device for the manual operation of a blind, preferably a vertical blind, by way of a pull cord, which is pulled as a loop with a leading end and a return end by a slat carriage movable in a guide with a slat each arranged on them around their longitudinal axis. The cord is led in a rail which blocks access to a majority of the cord. The rail has channels extending in a longitudinal direction defining passages for the leading end portion and the return end portion of the pull cord. The section rail also defines access openings for providing access by an operator to grip and move the pull cord through the rail. The rest of the rail blocks access to the pull cord.

Abstract: The present invention pertains to a vertical blind with a crank rod for horizontally displacing and for pivoting the slats, which can each be pivoted by approximately 180.degree. in both directions up to a common plane by a pivoting gear in a slat carriage, which is horizontally movable in a support rail, about a vertical pivoting axis, wherein the crank rod can be coupled with a driving wheel, which is mounted in an end carriage and which is arranged on a pivot shaft, which meshes with a toothed wheel of the pivoting gear in the slat carriage in an axially displaceable manner, but in a manner adapted to rotate in unison. The toothed wheel can be moved about a toothed wheel approximately 180.degree. from one side of the common plane of the slats to the opposite side in a curved guide, which is arranged at the end carriage.

Abstract: A working process for producing pockets at the ends of slats of a slat web made of a flexible material and to a device for carrying out this process. The essential feature is the arrangement of a feeding device, by means of which the section of a web-like welding flux needed for a welding process can be inserted transversely to the longitudinal direction of the slat from the side into the partially open slat pocket, and the welding flux is fed at a linear distance.

Abstract: A vertical blind device with a crank rod for operation, in which slats, which are hung on slat carriages, can be pivoted about a vertical axis by 180.degree. from a closed hanging position, directed horizontally in a plane parallel to one another, into the other closed hanging position and are horizontally movable with the slat carriages in a support rail. A pivot pin of a pivot drive is provided for a pivot shaft, guided through all the slat carriages in an axially displaceable manner and adapted to rotate in unison, and the crank rod have complementary coupling elements. The pivot pin lies with its coupling element in the two stopped positions of the slats laterally outside the plane of the closed hanging. During a reversed rotation, the pivot pin with its coupling element, together with the 180.degree. pivoting movement of the slats, pivots from one side to the other side of the then closed hanging slats.

Abstract: A device for the manual operation of a blind, preferably a vertical blind, by way of a pull cord, which is pulled as a loop with a leading end and a return end by a slat carriage movable in a guide with a slat each arranged on them around their longitudinal axis. The device has a grip body that can be grasped, with a passage for the leading end and a passage for the return end of the pull cord. A clamping device is provided that can be switched from the outside for the leading end. A clamping device is also provided that can be switched from the outside for the return end (6b) of the pull cord (6).

Abstract: A window shade, in which a winding shaft, which is rotatably mounted with its ends on stationary pivot pins, can be coupled with a drive member at one of its ends. At least one rolling body is arranged in a recess, which is wedge-shaped in the circumferential direction, between an inner jacket surface of a pivot sleeve projection, which is rigidly mounted on the pivot pin, and an outer jacket surface of a shaft sleeve projection, which is rigidly mounted on the winding shaft. The rolling body acts as a locking member and is clamped in the wedge-shaped recess and can be released from the clamped position by an opening element movable by the drive member in the direction of rotation.

Abstract: A mounting bracket wherein a base (12) is secured to an arm (20) by a fastener (22). A cam post (28) has a head (30) that is connected to arm (20) by a shaft (32). A spring clip (34) has an aperture (40) that is contoured in correspondence with head (30) and is retained between head (30) and arm (20) at selected angular positions about cam post (28).

Abstract: The present invention pertains to a window shade with a winding shaft (1), at one end of which a drive assembly is provided, and both ends of which are rotatably mounted in stationarily mounted brackets (8). So as to use identical brackets to mount the winding shaft at both ends at the end of the winding shaft (1) located opposite the drive assembly, a mount with a shaft journal (4) mounted freely rotatably in a housing (3) on the winding shaft is provided, which shaft journal (4) has, at an end projecting from the housing (3), a receiving slot of polygonal cross section, which is open on one side, for a support pin (7) of a corresponding cross section, which is provided on the bracket (8), as well as an elastically deformable locking element (5), which holds the support pin securely in the receiving slot.

Abstract: The present invention pertains to a window shade drive with an automatically acting coupling, which has friction surfaces and is arranged between a stationary component (9) and a driving member (3) connected to the winding shaft, wherein two coupling elements are movable axially and in the direction of rotation in relation to one another to operate the coupling by rotating the drive member. In such a drive, one of the coupling members is connected to the drive member (8) by a member (7, 18), which generates a torque between this coupling element (disk 5) and the drive member (8) within a range, and the other coupling element is provided at an end disk of an assembly of a plurality of brake disks (1, 2), wherein the end disk is coupled nonrotatably, but axially displaceably with the driving member. The brake disks (1, 2) are alternatingly connected rotatably to the driving member (3) and to a stationary component (9).

Abstract: A vertical blind construction, including slats arranged hanging on a slat carriage each, tiltably around a vertical axis, and with a driving element (1), whose direction of movement is reversible, or a gear, which can be connected by coupling elements to an endless pull cord (6) for laterally displacing the slat carriages guided in a support rail (31), and to a grooved shaft (11), which passes through a tilting gear for tilting the slats in the slat carriages. The rotatable driving element (1) in connection with a planetary gear, wherein the driving element (1) is connected to the central gear (2), whose outer ring (4) is connected by a first recording disk idling gear (5), whose idle is adjusted to a slat tilt angle of 180.degree., to a drive gear (7) or the pull cord (6) and, via an intermediate gear (10) as well as a slip clutch (13), to the grooved shaft (11). The slip clutch (13) is associated with a second recording disk idling gear (12) for a slat tilt angle which likewise corresponds to 180.degree.

Abstract: A vertical blind has a bearing member, a plurality of travelling carriages displaceable in the bearing member and carrying hanging members, and a plurality of brackets each at least partially surrounding the bearing member and arranged to displace along the latter together with the respective hanging member without pivoting together with the latter.