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This article describes a gate mechanism for opening a gate in a copier machine to release a sheet of copy paper one or more times per drum rotation or once every two drum rotations or more, as needed.
English (United States)
This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately
61% of the total text.
Page 1 of 2
This article describes a gate mechanism for opening a gate in a copier
machine to release a sheet of copy paper one or more times per drum rotation or
once every two drum rotations or more, as needed.
Fig. 1 shows a gate 10 mounted for rotation on shaft 11. Gate 10 blocks the
paper path in order to hold copy paper 12 until the correct sequential time to
release paper 12 so that the leading edge of the paper mates with the leading
edge of an image on photoconductor drum 13. In order to open gate 10, gear
section 14, fixedly mounted on drum 13, rotates into engagement with gear
section 15, thus rotating gate shaft 11 through drive belt 16.
Fig. 2 shows the position of gear segment 15 and gate shaft 11 just before
engagement of gear sections 14 and 15, and Fig. 3 shows segments 14 and 15
just after disengagement. Note that ratchet teeth 17 are mounted on gate shaft
11 and mate with ratchet 18 to hold gate 10 in an open position after
disengagement of gear sections 14 and 15.
In order to reclose gate 10, a striker 19 attached to drum 13 rotates with the
drum to strike cam 20 and thereby release ratchet 18, allowing gate shaft 11 to
rotate under the influence of a return spring (not shown) until gate 10 is in the
closed position. Gear segment 15 rotates backwardly with gate shaft 11 under
the influence of belt 16 so that gear segment 15 is also returned to its start
Should it be desired to open gate 10 once every two or more drum rotations,