29, 1931. B. NEGRINI TRUCK AND GUIDE MEMBER FOR ROLLER BLINDS Filed May 12, 1931 2 Sheets-Sheet 2 a Fw A gx, e Hm' Patented Sept. 29, 1931 UNITED STATES PATENT OFFICE BRUNO NEGRINI, F BOLOGNA, ITALY TRUCK ANZD GUIDE MEMBER FOR ROLLER BLIND S Application filed May 12, 1931, ...
Roller blinds 专利名称：Roller blinds 发明人：Enar S. Von Knorring 申请号：US06/031088 申请日：19790418 公开号：US04262729A 公开日：19810421 专利内容由知识产权出版社提供 摘要：A roller blind has a roller with axially projecting trunnions each of which engages in an elongated slot in a ...
A safety device for preventing a pushing up of a slatted roller blind, which safety device is disposed in a channel-shaped lateral guide rail (2) and consists of a plurality of identical locking members (12), which are arranged one over the other and are pivoted to one end of a slat ...
Roller blinds Advantages : 1. Rail: 38mm aluminum oxide rail, rust proof and more durable 2. High-quality Material: shading ratio 80% 3. Bottom rail: 1mm thick spraying aluminum rail, solve imbalance situation after window blinds installation 4. Pulling bead control system: through ...
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of different lengths of a window installation by a non-positive connection of the corresponding edge rollers of the roller blinds via a single mechanical drive, it being possible to arrange directly next to one another the guide rails for the roller blinds which are situated next to one another...
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Weifang Mingchen Sunshade Technology Co., Ltd., specializing in R & D, production and sales of blinds motor.The factory covers an area of more than 30,000 square meters, has 100 employees, annual sales of $30 million, has the world famous certifi...