Writing device for drawing machine

Details Writing device for drawing machine Writing device for drawing machine

G - Physics

01

D

234/37

G01D 15/00 (2006.01) B43L 13/02 (2006.01) G01D 15/22 (2006.01)

Patent

CA 1238619

70956-38 ABSTRACT Disclosed is a writing device comprising a write head and a magazine for storing a plurality of writing members to selectively replace the writing member of the write head. The write head has a support to receive a writing member, a positioning arrangement for laterally positioning the writing member and a holding arrangement on the support for applying a magnetic attraction force to the writing member to urge it into engagement with the positioning arrangement. The writing member is separable from the support by pulling the writing member against the magnetic attraction force. The magazine has a plurality of laterally opened housings each having abutting surfaces to be engaged by a respective writing member and a second holding arrangement for applying a second magnetic attraction force to each of a plurality of writing members to hold them in engagement with the abutting surfaces. A transfer device temporarily varies at least one of the magnetic attraction forces to change the resultant force between a positive value able to transfer a writing member from the write head to the magazine and a negative value able to trans- fer a writing member from the magazine to the write head. 63,108/117

484735

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