Patent GB-917781-A (GB)
Title: Record clamping and stripping mechanisms for facsimile machines and the like
IPC: H04N1/08
Filed: 1959-09-15
Abstract: 917,781. Document copying apparatus. TIMES FACSIMILE CORPORATION. Sept. 15, 1959 [Dec. 9, 1958], No. 31439/59. Class 100 (2). [Also in Group XL (b)] In a facsimile receiver comprising a drum on which a recording sheet is to be held, means to stop the drum in a sheet loading and unloading position and a plurality of sheet-gripping elements mounted interiorly of the drum, the elements are secured at their inner ends to the drum shaft and their outer ends extend through the drum to secure the sheet against it periphery and means provided for operating the gripping elements into operative and inoperative positions includes a sleeve cam concentrically surrounding said shaft and arranged to be coupled and uncoupled to the shaft and provided with a plurality of camming shoulders for moving said elements into gripping relation with the drum when in the stop position of the drum, the sleeve is turned independently of the shaft through a predetermined angle. The drum 11, Fig. 1, mounted on a shaft 15, is driven through a slipping clutch 14 from a motor 12 and is arrested in a predetermined position for loading and unloading by a latch 17 engaging an arm 16 secured to the shaft 15 when an electromagnet 18 is de-energized by the opening of contacts of a switch 19. The shaft 15 is formed with notches 15a, 15b, Figs. 5 and 6, having flats 27a, 27b relatively disposed at about 45 degrees to one another, and on which are mounted clamping members 25 and stripping members 26 with terminating portions 32, 37 located adjacent slots 33, 38 in the surface of the drum 11. The unstressed conditions of the members 25, 26 are indicated in Figs. 5, 6 with portions 31, 41 lying adjacent the clamped arms 29, 42. A camming sleeve 35 rotatable on the shaft 15 has notches 36a, 36b disposed in relation to the flats 27a, 27b so that rotation of the sleeve 35 through 90 degrees causes the arm 31 to move down so that the end 32 is in a position, as indicated by Fig. 4 (not shown), to grip the paper 21. In such position of the member 25 the member 26 is in its corresponding position with its end 37 within the slot 38. At the position corresponding to Fig. 5, i.e. for unloading and then inserting a fresh sheet 21, an unnotched part of the sleeve 35 engages the arm 41 to move the end 37 of the member 26 to its outer position in which it discharges the sheet 21 from the drum. The stopping of the drum and the unloading and loading operations are controlled by a handle 23, Figs. 1 and 2, carrying a plate 45 which can pivot on a shaft 47 and slide on a shaft 49 by means of a slot 48. Movement of the arm 23 to the left engages a plate 52, Fig. 1, secured to a collar 53 pinned to the shaft 49 to which is also pinned a sleeve 69 carrying a plate 20 which opens switch 19 to deenergize magnet 18 and release latch 17 to stop the drum. With the drum in its correct stopping position a pin 62, Figs. 1 and 8, on the shaft 15 registers with a notch 58, Fig. 8, on a flange 56 of the collar 53 and a projection 66 on a sleeve 59 coupled to sleeve 35 can be engaged in a recess 67 of the collar 53 so that the handle 23 can be moved to the left, and with it the coupling sleeve 59 so that the pin 62 is in alignment with the circumferential slot 64. The handle 23 can now be moved upwardly and by means of a pin 51, Figs. 1 and 2, engaging a slot 50, Fig. 2, in the plate 45 the collar 53 is rotated thereby rotating the sleeve 35 through approximately 90 degrees so that the clamping and stripping members 25, 26 are moved respectively to the position shown in Fig. 5 and to that indicated in Fig. 7 (not shown). After a fresh sheet has been loaded, the handle 23 is moved down to its horizontal position in which it is moved to the right by the collar 53 and spring 56 with the plate 20 operating switch 19 so that the latch 17 is withdrawn from engagement with the arm 16.