DE2707448A1 - METHOD OF CHANGING THE DIRECTION OF TRAVEL OF SHEETS - Google Patents

Description

XEROX CORPORATION Xerox Square, Rochester, New York 14644, USA Procedure for changing the direction of port movement

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The invention relates to a method by adding port movement of leaves, such as sheets of paper

Those skilled in the art of paper handling will know that there is often a need for facilities capable of moving in one direction by acting on one Leaf deseen to reverse direction of movement. Such a pro » direction is in copending U.S. patent application Serial Vr. 526 650, submitted on November 25, 1974 ()

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TELeX 0S-90 38O

TELEARAM MONAPTH TaLEKOPIKRSR

27Q7448

written · This patent application discloses a xerographic Machine in which a vacuum sweeper is arranged. The repentance he comprises a first and a second roller forming a first pair of rollers for receiving copy sheets, the the first roller is driven in a direction to advance a sheet and the second roller is free to rotate to interact with the first role. A second pair of rollers, the first roller and a third, freely rotatable Roller is capable of transporting the sheet in the reverse direction · A third pair of rollers, the downstream of the first and second pairs of rollers is provided with a tension roller and a co-operating therewith eccentric single-turn roller and transports the sheet in the same direction as the second pair of rollers, when the eccentric roller is actuated by a feeler which detects the exit of the trailing end of the sheet from the roller nip of the first pair of rollers. It is clear that the distance between the third pair of rollers and the others Sets a limit for the smallest paper size for pairs of rolls, which are introduced in the direction of the gate to prevent movement can·

The invention therefore aims to provide a method for reversing the direction of movement of a sheet in which a fluid is used to move a sheet in an opposite direction. The invention also seeks a method of reversing the direction of travel of a sheet, comprising a step in which the sheet is reversed before it is reversed is aligned with its direction of movement

To achieve this, the invention provides a method for Indians the direction of locomotion of a sheet, the following Steps include: a) providing a compartment; b) inserting a sheet moving in a first direction into the field of expertise; and c) providing a first flow of fluid in the compartment to move the sheet in a substantially opposite direction to steer and thus reverse the direction of travel of the sheet.

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sweep.

Compared to the earlier procedure »as stated in the patent application mentioned described iat, “since a third pair of bolls is not required, the length range of the leaves that can be reversed with the method according to the invention, for a compartment the length of which is equivalent to the downstream length of the first and second pairs of bolts, be greater "

Further features, details and advantages of the invention emerge from the following description of an exemplary embodiment with reference to the accompanying drawings.

Pig.1 is a plan view of a device used to practice the Invention can be used; and

Pig.2 is a sectional view of the device along the line 2-2 in Pig. 1.

The device shown in Figures 1 and 2 for practicing the invention can be a fluidic device 9 »a Bollard assembly 11 for guiding sheets into and out of a rectangular compartment 10 of the apparatus, a conveyor 12 for transporting the leaves into contact with the bollard assembly and a conveyor 13 for carrying away the leaves discharged from the bollard assembly.

The bolt arrangement has a driven shaft 15 to which a pair of bolts 16 and 17 is attached, and a fixed axle 18 on which a pair of following bolts 19 and 20 is rotatably mounted. The studs 19 and 20 each form a gap in cooperation with the studs 16 and 17, respectively for feeding sheets of paper, for example, into the tray. Furthermore, the bolt arrangement also includes a fixed one Axle 21 on which a pair of rotating bolts 22 (only one of which is shown) are seated, which are connected to rollers 16 and 17 together form roller gaps for ejecting the sheets emerging from the compartment. It is clear from this that a single

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'fr drive (not shown) is required to assemble the bolt assembly to drive.

The etrömungstechniache device 9 has a rectangular shape Housing 25 which forms the compartment 10 mentioned above. The rear wall 27 of the housing is aligned with a group on a line Provides holes 28 and holds a distribution box 29 »whose chamber is connected to the compartment via the group of holes stands. The distribution box 29 is connected to a reversing pump 30 so that fluid is sucked out of the compartment and into the Tray can be blown. Similarly, a narrow side wall 31 of the housing is provided with a number of linearly aligned holes 32 and holds a junction box 33 » its chamber communicates with the Faoh through these holes stands. The distribution box 33 is connected to a vacuum pump 34 and can therefore be used to suck fluid out of the Faoh.

The device described can be operated in various ways will. For example, a rectangular sheet of paper moving on the conveyor 12, such as through a Arrow 40 indicated, with the help of the hollows 16, 17 »19 and 20 be introduced into the subject. During the one-way level, you can the pump 30 work in pressure mode. Hence, if that The leaf is released by the Bollen, its kinetic energy is overcome by the fluid flowing out of the Faoh and the The direction of travel of the sheet is reversed. The bolt assembly consequently moves the sheet in the direction indicated by arrow 42 indicated collation and the sheet is transported by the conveyor 13 transported away · In a second operating mode, when a sheet is delivered to the Bollen 16, 17 »19 and 20, the Pump 30 operate in suction mode. Hence the leaf, when it is released by the bolts 16, 17, 19 and 20, brought to bear on the wall 27. Thereafter, the pump 30 is im Print mode operated. The fluid flow generated by the pump 30 in the compartment then moves the sheet to the inlet in the Bollenan

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Order and the sheet is ejected. It should be noted that when the blade is practically flat and the fluid flow evenly, the alignment from the attachment to the wall is maintained while the leaves are in the boll arrangement be driven forward. This is especially true if the sheets delivered are only a little shorter than the length of the compartment is. If more accurate alignment is desired, the pump 34 can be started. The pump 34 sucks leaves into the compartment and against the wall 31 and this wall serves as a guide when a sheet is supplied by one of the pump 30 Fluid flow is driven out of the compartment

When the pump 30 is used to both suck and blow in fluid, it can be operated automatically by means of a Control 43 are actuated, which is based on an arrangement 46 of a electrical eye responds, which is attached to the wide walls of the housing next to the wall 27. As the expert on becomes evident in the field of display technology, the controller 43 may comprise a monostable multivibrator, which in its steady state causes the pump to operate in suction mode until a leaf is sensed. Then the toggle switch operate the pump as the fluid source for a predetermined period of time. For sheets of a certain length and a certain weight, the period of time can be set so that the pump injects fluid just long enough, around the originally trailing edge of a sheet with the drive rollers 16 and 17 and the idle rollers 22 (only one shown), whereupon the pump returns to suction mode to allow a sheet to enter the Support tray. From the above] it is clear that sheets entering and exiting the compartment are at least partially can be present at the same time.

The invention is not intended to be limited to the above embodiment; their scope is given by the claims

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Claims (10)

'2707443 Expectations ί 1 · Method of changing the port moving direction of a sheet , characterized in that a) a subject is provided, b) a sheet moving in a first direction is directed into the bin and c) a first fluid flow is provided in the compartment in order to to drive the leaf in practically the opposite direction. 2. The method according to claim 1, characterized in that in the compartment, a second fluid stream for sucking an edge of a sheet advancing in the first direction is intended to be placed on a rear wall of the compartment 3. The method according to claim 2, characterized in that the first and second fluid streams provided alternately in the compartment will· 4 · The method according to claim 3 »characterized in that the time during which each of these fluid streams is present in the compartment is controlled. 5. The method according to claim 1, characterized in that in a further stream of fluid is provided to the compartment in order to move a sheet in the opposite direction to drift against a narrow side wall of the Faohes 6. The method according to Anspruoh 5 t daduroh that in a second stream of fluid is provided to the compartment around an edge of one advancing in the first direction Leaf to plant on a rear wall of the Faohes 7. The method according to claim 6, characterized in that the first and second fluid stream alternately provided in the compartment 709838/0627 will see and that when the first fluid flow is present, the mentioned further fluid flow is also present. 8. The method according to claim 7, characterized! that the Time during which the first and second fluid streams in the subject is present is controlled. 9 · The method according to claim 8, characterized in that with a reverse pump is connected to the compartment to provide the first and second fluid flows. 10. The method according to claim 9, characterized in that the dad Movement of a sheet in the compartment is detected at the time during which the first and second fluid flows is present in the subject to control 709838/0627