| 摘要 |
912,766. Glass-bending moulds. PITTSBURGH PLATE GLASS CO. Aug. 12, 1960 [Aug. 14, 1959], No. 28080/60. Class 56. In apparatus in which a movable mould member is connected to the fixed member by a knife-edge pivot, one of the members also carries a pin passing through a hole in a part carried by the other, the hole providing clearance for the pin of the knife edge pivot operates correctly but preventing excessive movement if there is relative displacement at the knifeedge pivot. The form shown comprises stationary shaping rails 11, 12, and pivoted end sections 25, 26, all of inverted T-section. This form also provides a longitudinal bend and a side plate 24 extending outwardly and upwardly from the rail 24 supports one edge of the glass in order to produce this bend. Each of the end sections 25, 26 carries projecting arms 36, by means of which the section is mounted on its pivot, and which carry counterweights 38. Movement of the end sections is limited by stops 40, attached to the rails 11, 12, to engage the arms 36 outwardly of the weights 38. Each of the hinges 42, 43 comprises a member, Fig. 3, with a central portion 70 attached to the arm 36 and having depending lugs 72, 68. The latter is notched when it rests on a knife edge 62 carried from the main frame. In the pivot 43 the knife edge 62 is itself notched at 76. The knife edge of the pivot 42 has a straight top. To prevent accidental separation of the parts of the pivot assembly a nut 66 is attached to the knife edge on the pivot axis and receives a bolt 74 passing with clearance through a hole 73 in the lug 72. Heat-absorbing members underlie each end of the glass sheet to prevent excessive softening. Another heat-absorber under the central part of the sheet comprises a wire mesh 48 and a plate 52. Specification 804,576 is referred to. |
