Patent GB-1173949-A (GB)
Title: Improvements in or relating to Work Guides in Rotary Cup Feed Sewing Machines
IPC: D05B27/18
Filed: 1967-07-06
Abstract: 1,173,949. Sewing machines. VIRGINIO RIMOLDI & C. S.p.A. 6 July, 1967 [27 July, 1966], No. 31177/67. Heading D1G. A cup feed sewing machine in which the feed cups rotate about vertical axes comprises an uncurler guide having opposed work-clamping members pivoted to a pivoted arm and having extensions spring biased to engage said members with the arm, 'said extensions being located, when the arm is in an operative position adjacent the feed cups, adjacent a pair of converging surfaces, whereby, when the arm is swung away from the cups to an inoperative position, the extensions engage said surfaces to separate said members from the arm. The uncurler guide comprises an arm 65 pivoted on a shaft 66 journalled in a bracket 80. A pair of clamping members 70, 71, positioned one on each side of a blade 69 extending downwards from arm 65, are pivoted at 72 to arm 65 and have upward extensions 73, 74 biased apart by a spring 75 to engage members 70, 71 with blade 69. A spring 81 biases arm 65 clockwise to an operative position in which members 70, 71 are located adjacent the feed cups (36), 40, when the extensions 73, 74 are located adjacent converging surfaces 88 on a bracket 86. Arm 65 is rigid with a disc 76 which is journalled on shaft 66 and is formed with a notch 77 engaged by a spring- biased pawl 78, pivoted at 79 to bracket 80, when arm 65 is in the operative position. Shaft 66 is rigid at one end with an arm 67, and at the other end with a cam disc 68. Arm 67 is connected by a chain 82 and cable 83 to a pivoted arm (49) which is also connected by one linkage to feed cup 40, and by another linkage to the armature of a solenoid (94). When the latter is energised to lower arm (49), feed cup 40 is separated from. feed cup (36) and arm 67 is swung counter-clockwise, whereby a cam surface 90 on disc 68 raises pawl 78, and an abutment surface 91 on disc 68 engages a pin 92 on disc 76 to rotate the latter till pawl 78 is located on a peripheral surface 93 of disc 76. Extensions 73, 74 also engage the surfaces 86 and are thereby moved towards each other to separate the members 70, 71 from blade 69. The upper edges of a work piece are then positioned between blade 69 and the respective members 70, 71, the height of said edges being determined by their abutment with a pin 64' carried by blade 69, and said edges are also introduced between the feed cups (36), 40. Solenoid (94) is then de-energised, whereby cup 40 returns into abutment with cup (36), members 70, 71 return into abutment with blade 69, and arm 65 returns to its operative position, pawl 78 re-engaging notch 77. When pawl 78 is engaging surface 93, arm 67 may be turned manually counter-clockwise to engage pawl 78 with a notch 77' in disc 68. If arm 67 is turned further counter-clockwise, a cam surface 97 on disc 68 raises pawl 78 from notch 77', and further turning of arm 67 serves to position pawl 78 on a surface 98 on disc 68 to locate the members 70, 71 in a fully raised position. Brackets 80 and 86 are connected by a member 86' to a vertical rod 105 which may be raised by a lever 103 and link 99, against the bias of a spring 109, to vary the height of the edges of a workpiece.