US3107089A

US3107089A - Sheet side registration apparatus

Info

Publication number: US3107089A
Application number: US91814A
Authority: US
Inventors: Kenneth L Lockey
Original assignee: Burroughs Corp
Current assignee: Unisys Corp
Priority date: 1961-02-27
Filing date: 1961-02-27
Publication date: 1963-10-15
Anticipated expiration: 1980-10-15

Description

Oct. 15, 1963 K. L. LOCKEY SHEET SIDE REGISTRATION APPARATUS 5 Sheets-Sheet 1 Filed Feb. 27, 1961 INVENTOR. KENNETH L. LOCKEY. BY

Oct. 15, 1963 K. L. LOCKEY SHEET SIDE REGISTRATION APPARATUS 3 Sheets-Sheet 2 Fig. 2,

Filed Feb. 27, 1961 INVENTOR. KENNETH L. LOCKE').

H (a- W ATTORNEY.

Oct. 15, 1963 K. L. LOCKEY 3,107,089

SHEET SIDE REGISTRATION APPARATUS Filed Feb. 27, 1961 3 Sheets-Sheet 3 Fig. 3. 35 40 Fig.4.

JNVEN TOR.

Kf/VNETH L.LOCKE Y. BY

United States Patent This invention relates generally to a sheet transport system and, more particularly, to a sheet side registration apparatus therefor.

It is an object of this invention to provide an improved apparatus for side registering sheets without requiring interruption of the normal forward flow of the sheets.

it is an additional object of this invention to provide a side registration apparatus for sheets which is particularly adapted for the feed of sheets of varying widths and lengths or for feeding of web materials.

vIt is a further object of this invention to provide a side registration apparatus for sheet feeding whereby the force applied through the sheet against the side guide is readily removable to prevent damage to the sheet edge.

It is a still furthe object of this invention to provide a side registration apparatus for a sheet transport system which is reliable in its operation regardless of the contour of the sheet path required.

These and other objects of the present invention will become apparent from the following description. In order to more clearly understand the present invention, reference may be made to the accompanying drawings which illustrate one preferred embodiment.

In the drawings:

FIG. 1 is a top plan view of a linear portion of the sheet transport system. A part of the sheet is broken away to show the interrelation of the parts;

FIG. 2 is an elevation of a curvilinear portion of the sheet transport system:

FIG. 3 is a front elevation of the side registration apparatus; and

FIG. 4- is a detail showing the pressure roll and its mode of assembly.

With reference to the drawings, FIG. 1 shows the basic construction of the transport system which includes a supporting means having side frames :14 and 12, which are spaced apart by a plurality of rods 14. A plurality of longitudinally extending upper and lower guide rails 15 and 16a serve to define the pathway for the sheet and are laterally movable along rods 14 to accommodate sheets of varying widths. The side registration apparatus is associated with the sheet drive apparatus and is mounted along the left-hand side frame in. Journalled in side frame 1d are a plurality of shafts 18, each of which carriers a drive roll 29. Each drive roll 29 is engageable with the lower surface of a sheet 22 shown moving in an arrow indicated path through the transport system. Each drive roll 20 is preferably formed of a material of a relatively low coeficient of friction such as stainless steel and the like. Each shaft 113 is coupled to a drive mechanism including pulleys Z4 and belts 26 which receive a common drive from drive motor 23 shown hereinafter in connection with FIG. 3. A plurality of pressure rolls 3 are shown in engagement with the'upper surface of sheet :22. Pressure rolls 36 are preferably formed of material having a relatively high coelficient of friction as compared to drive rolls 2% such as plastic, rubber or the like. Each roll 30 is forced downwardly and into engagement with the sheet and the drive roll 2% therebeneath by the substantial weight of a lever or mounting plate 32. Each mounting plate is pivotally mounted or hinged at one edge to a shaft 63 extending from the outer surface of side frame 19 in bushings of a bracket. The side guide for the left-hand edge of the sheet is provided by ice a U-shaped channel 34 mounted on the inside surface of side frame :11). Each pressure roll is rotatively mounted in a pivotable bearing member or yoke 36. The yoke '36 has an upstanding stud 37 which is journalled in a lateral extension or end portion of rigid lever 38, which extends from plate 32. An overcenter spring 40 is coupled between n'gid lever 33 and a plate or arm 39 mounted on the upper end of stud 37 to normally bias the yoke 36 and the roll 34} which it carries so that the axis of the roll is diagonal to the side guide 34. Thus, it will be seen that, with roll 30 in frictional engagement with the sheet, it will exert a force on the sheet tending to drive the sheet toward the side guide 34.

FTG. 2 shows a portion of the side registration apparatus arranged along a combined linear and curvilinear path. When the sheet moves through side guide 34 and between guide rails 16 and 16a, it is subjected to a variable force in opposition to its forward movement. The apparatus of the present invention is particularly adapted to keeping the sheet registered in such a system. The individual pressure rolls 3% are displaceable between an active and an inactive state by a single pivotal movement with a minimum of travel from side guide =34 required. This enables the feeding of a wide range of widths of sheets. The successive individual operation and deactivation of the pressure rolls, as best illustrated in FIG. 1, makes possible the feeding of an accurately side-registered web. Further shown in FIG. 2 are screws 42, which provide a limit for the clockwise pivotal movement of rolls 3% so as to inactivate them by aligning their axes parallel to their opposed drive rolls 20.

FIG. 3 illustrates the conventional manner in which the drive of motor 28 is transmitted through belts 26 to drive rolls 2th Also shown is the manner of movement of the sheet 22 between rolls 2t and 343'. In this figure the lefthand'edge of sheet 22 has not yet has been properly registered with the side guide 3-4- so that roll 36 is shown in a position whereby it is driving the sheet in toward side guide 34. Also shown is the manner in which the sheet 22 is generally confined between upper guide rails 16 and lower guide rails FIG. 4 shows the pressure roll '30 in its extreme leftward position against a bumper 44 mounted on the end of plate 32. A portion of the end of rigid lever 38 is broken away to illustrate the location of limit screw 42 to stop the rightward pivotal movement of yoke 36 when roll 39 has its axis parallel to that of roll 20. Also shown is the manner in which spring 4% is mounted over-center relative to the center of rotation or pivot point for yoke 36 furnished by stud 37.

The mechanism provided by the present invent-ion pr vides a high degree of alignment accuracy for sheets in transport. The pressure roll and driving roll arrangement makes a force immediately available to register the sheet edge. As the edge of the sheet strikes the side guide, the slight clockwise turning of the sheet initiates the pivotal movement of the pressure roll into its inactive position and the pressure of the sheet edge against the side guide is immediately relieved. Thus, the present invention provides protection against damage to the edge of the sheet. The alignment of the axis of drive roll 29 is substantially normal to the side guide and the path of the sheet so that forward drive proceeds without interruption during the registering action of the pressure roll.

What is claimed is: v

1. In a sheet transport apparatus, laterally spaced pairs of rails defining a path of sheet travel, supporting means supporting said rails, a sheet side edge guide member parallel to said rails, a rigid lever hinged to said supporting means and extending over said guide member parallel to the hinge axis, a lower sheet driving roller arranged with its axis of rotation at right angles to the path of sheet travel, an upper pressure roller mounted to swivel on said lever in overlying relation to said driving roller, and an overcenter spring holding said pressure roller in position to urge a sheet against the side guide 'member and yieldable to the feeding force of the driving roller on alignment of the sheet.

2. In a sheet transport apparatus, laterally spaced pairs 7 of rails defining a path of sheet travel, supporting means supporting said rails, a sheet side edge guide member extending along said rails, a rigid lever hinged on said supporting means to pivot about an aXis transverse to the path of sheet travel, said lever extending over said guide member crosswise of the path of sheet travel and having an end portion extending counter to the direction of sheet 15 2,767,982

Referenees Cited in the file of this patent UNITED STATES PATENTS 1,973,749 Dawson Sept. 18, 1934 2,368,098 Belluche Jan. 30, 1945 2,674,456 Gibson Apr. 6, 1954 Noon Oct. 23, 1956

Claims

1. IN A SHEET TRANSPORT APPARATUS, LATERALLY SPACED PAIRS OF RAILS DEFINING A PATH OF SHEET TRAVEL, SUPPORTING MEANS SUPPORTING SAID RAILS, A SHEET SIDE EDGE GUIDE MEMBER PARALLEL TO SAID RAILS, A RIGID LEVEL HINGED TO SAID SUPPORTING MEANS AND EXTENDING OVER SAID GUIDE MEMBER PARALLEL TO THE HINGE AXIS, A LOWER SHEET DRIVING ROLLER ARRANGED WITH ITS AXIS OF ROTATION AT RIGHT ANGLES TO THE PATH OF SHEET TRAVEL, AN UPPER PRESSURE ROLLER MOUNTED TO SWIVEL ON SAID LEVER IN OVERLYING RELATION TO SAID DRIVING ROLLER, AND AN OVERCENTER SPRING HOLDING SAID PRESSURE ROLLER IN POSITION TO URGE A SHEET AGAINST THE SIDE GUIDE MEMBER AND YIELDABLE TO THE FEEDING FORCE OF THE DRIVING ROLLER ALIGNMENT OF THE SHEET.