| 摘要 |
933,856. Rivets &c. BRITISH URALITE Ltd. Sept. 16, 1959 [Sept. 16, 1958], No. 29680/58. Class 89(1). A rivet for securing articles to fibre-board comprises a tubular body 1 with a head 2 at one end and longitudinal slits 3 between the ends, and a headed mandrel 5 which is pulled to expand the body. The mandrel may have a break-neck, or the projecting part of the mandrelstem may be screwed to receive a nut &C |
