# US 4,333,509 A · Sectional Venetian blinds > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,333,509 A - Document ID: US4333509A - Status: Granted - Kind: A - Application number: 06/087,029 - Filed: 1979-10-22 - Granted: 1982-06-08 - Earliest claimed: 1979-10-22 - Assignees: Ohline Corporation - Inventors: William H. Conn - Web page: https://patentgrep.com/patent/US4333509A ## CPC - E06B 9/384: Details of interconnection or interaction of tapes and lamellae - E06B 9/386: Details of lamellae - Y10T 403/1624: Related to joint component - Y10T 403/55: Member ends joined by inserted section - E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A sectioned Venetian blind slat and mechanism for joining the sections thereof to permit a broken slat to be replaced without the necessity of taking the entire blind to a repair shop. Fabrication of slats through the use of the joint mechanisms of the invention results in simplification of manufacturing techniques and the realization of economies through being able to use shorter pieces of wood such as were formerly treated as scrap in the manufacture of full length slats. Contrasting shades of wood sections may be employed to develop a contrasting pattern in a blind. ## Claims ### Claim 1 A Venetian blind having a plurality of slats supported in spaced relationship by a support structure which includes at least a pair of lift strings threaded through the slats in positions on opposite sides of the center plane of the blind, at least one of the slats being constructed in sections situated on opposite sides of a lift string, the sectioned slat having a joint encircling the lift string, said joint comprising adjacent end portions of said slat sections shaped for joining together in abutting relationship and concealed joining means encased within said end portions, said joining means comprising a plurality of pins mounted to extend from at least one abutting end portion for insertion into the other abutting end portion so as to be totally concealed within the sectioned slat joint. ### Claim 2 (depends on 1) The blind of claim 1 wherein the joining means releasably join a pair of sections in abutting relationship enclosing the lift string. ### Claim 3 (depends on 2) The blind of claim 2 wherein the abutting ends adjacent joined sections are shaped to define an opening, the edges of which extend completely about the associated lift string. ### Claim 4 (depends on 3) The blind of claim 3 wherein the joining means comprises a pair of pins for mounting in longitudinal holes drilled in the slat sections from abutting edges thereof, the two pins and associated holes being positioned on opposite sides of the opening. ### Claim 5 (depends on 4) The blind of claim 4 wherein the holes in one section are of equal length, the pins being of unequal length to facilitate aligning and joining the adjacent section to the pins. ### Claim 6 (depends on 4) The blind of claim 4 wherein the pins are of equal length and the associated holes are of unequal depth to permit the free ends of the pins to be staggered in order to facilitate aligning and joining the adjacent section to the pins. ### Claim 7 (depends on 1) A sectioned slat for installation in a blind of claim 1 comprising a plurality of sections having corresponding ends shaped for joining together in abutting relationship; and means for joining the abutting ends of the sections in a position surrounding one of the lift strings, said joining means comprising a plurality of pins mounted to extend from at least one abutting end for insertion into the other abutting end so as to be totally concealed when the slat is assembled. ### Claim 8 (depends on 7) The slat of claim 7 wherein said abutting ends are each shaped with a central recessed portion, the recessed portions jointly defining an opening and completely encircling the lift string when the sections are joined together in position in the blind. ### Claim 9 (depends on 7) The device of claim 7 wherein the joining means comprise a pair of pins for longitudinal alignment within longitudinal holes drilled in abutting faces of the sections, said pins serving to releasably join the sections and hold them in fixed juxtaposition relative to each other when the sections are positioned in abutting relationship in the blind. ### Claim 10 (depends on 9) The device of claim 9 wherein the longitudinal holes are of differing depths while the pins are of equal length in order to develop a staggered position of the pins when inserted in the holes of one section so that the pins can be aligned one at a time with corresponding holes in the other section during the joining together of two sections. ### Claim 11 (depends on 9) The device of claim 9 wherein the longitudinal holes in one section are of equal depth and the pins are of differing length so as to develop a staggered position of the pins when inserted in the holes of one section so that the pins can be aligned one at a time with corresponding holes in the other section during the joining together of two sections. ### Claim 12 (depends on 7) The device of claim 7 wherein the section ends abutting together are squared off to permit joining of adjacent sections with a virtually invisible juncture line. ### Claim 13 (depends on 7) The device of claim 7 wherein the slat sections are formed with two opposed, broad, generally planar and parallel opposed faces extending the thickness and width of the section. ### Claim 14 (depends on 13) The device of claim 13 wherein the slat sections are formed of generally flat elongated pieces of wood. ### Claim 15 (depends on 14) The device of claim 14 wherein the ends to be joined are shaped symmetrically with both said end portions having notches therein of like shape, extent and position.