US1830120A - And one-half to lewis m - Google Patents

Description

Nov. 3,1931. H, MCGOWAN 1,830,120

PRES SER ROLLER Filed Feb. l5, 1930 l YPatented Nov. 3, 119.31Y

PATENT OFFICE UNITED STATES HAR-OLD MCGOWAN, OF CHICAGO, ILLINOIS, ASSIGNOE OF ONE-HALF TO BINDERY SERVICE COIi'IPANY, INC., OF CHICAGO, ILLINOIS, AND ONE-HALF TO LEWIS M. PRYOR .AND MAURICE G. PRYOR, OF CHICAGO, ILLINOIS PRESSE-R ROLLER Application led February 15, 1930. Serial No. 428,807.

This invention relates to improvements in presser rollers for sheet conveying mechanism.

In sheet conveying mechanism, such as that generally employed for feeding sheets of paper to paper cutters for instance, it has been the practice to use one or more pairs of rubber rolls of sufhcient resiliency to compensate for varying space requirements due to different weights of the stock being fed to the cutters or to variations in the number of sheets that are fed to the mechanism in superimposed relation. Since the life of the rubber of the rolls is quite limited, necessitating frequent renewals, it is the principal object of this invention to provide durable presser rollers for sheet feeding mechanism which are self adjusting to accommodate variations in the weight of the stock or in the number of superimposed sheets passing therebetween.

Another object of the invention is to pro* vide a presser roller adapted to bear against the sheet material, to feed the same, and which is movable longitudinally and radially to accommodate various thicknesses of the material.

Other objects relate to various features of construction and arrangement of parts which will be apparent from a consideration of the following specification and accompanying drawings, wherein; A

Figure 1 is an elevation of two pairs of presser rollers embodying the present improvements, mounted on parallel rotatable shafts.

Fig. 2 is a vertical longitudinal section taken axially through one of the rollers.

Fig. 3 is an end View of a roller and shaft, looking to the left in Fig. 2.

Fig. 4: is a broken sectional view showing the presser rings displaced from normal concentric posion to accommodate stock of increased thickness.

In the drawings 10, 11 are parallel shafts and may be a part of, or associated with, any suitable feeding mechanism for sheet material, as paper. The shafts may be drive shafts by means of which the material is moved to Mountedon the shafts are presser rollers ari ranged in pairs, corresponding rollers of each pair being indicated by the numerals 12, 13. Between these rollers the stock `14, such as paper, is moved. There may be as many pairs ofrollers as required, two pairs being shown for the purpose of illustration.

.As shown in Fig. 2, a roller 12, which is identical with roller 18, comprises a hub portion 15 which is secured to the shaft 10 by a pin 16. The hub has a conical face 17 which terminates in a sleeve-like extension 18 having a flange 19 at its outer end. A presser ring 20, having a cylindrical outer periphery and an inner conical surface 21, is mounted on the hub 15 with the conical faces normally held in contact by a spring 22,one end of which seats against the surface 23 and the other end of which bears against the flange 19. As illustrated in Fig. 41, as a heavy sheet of stock, or a large number of sheets 14 pass between the pairs of rollers 12, 13, the rings 2() will be forced laterally against the action of the springs 22 and will rotate about an axis off-set from `the axes of the respective shafts. This longitudinal and radial movement of the rings varies in proportion to the thickness of the stock passing between them. The two rings of each pair move in unison and press against the stock on opposite sides thereof, and are simultaneously returned toward normal position by the respective springs when the thickness of the stock is lessened. The rings will thus be seen to be self adjusting to the thickness of the stock being operated on and always exert a uniform pressure against the stock.

Where the shafts 10, 11 are drive shafts, the springs 22 will be sufficiently stiff to prevent rotative movement of the rings 2O relatively to the hubs 15.

In some forms of sheet feeding mechanism the presser rollers on one shaft may be employed in conjunction with a conventional long roller on trie other shaft, the improved presser rollers serving to accommodate stock of different thickness. Other uses and combinations of the presser rollers may suggest themselves to those skilled in the art, and I cutting mechanism or they may be idlers. do not wishto be restricted to the specific embodiment of the invention herein shown and described except as so limited by the appended claims.

That I claim is:

l. A presser` roller for sheet conveying mechanism comprising a rotatable member adapted to be secured to a shaft against axial movement relatively thereto and having an outer conical face, a presser ring having an inner conical face adapted to coact With said first face, and a spring pressing against said ring and tending to cause the conical face thereof to seat on the conical face of said rotatable member.

2. A presser roller for sheet conveying mechanism comprising a pair of rotatable members adapted to be mounted on a shaft a spring tending to hold said members normally in concentric relation, one of said members being secured to said shaft against movement axially thereof and the other being movable axially of said shaft against the action of said spring and ra diallj7 with respect to the other member.

A presser roller for sheet conveying mechanism comprising a member adapted to be secured to a rotatable shaft against axial movement relativelyv thereto, said member having an outer conical face and an axially projecting sleeve portion, a presser ring having an inner conical face complemental to said conical face of said member, an out Wardly projecting portion on said sleeve, an d a spring surrounding said sleeve and confined between said projecting portion thereof and the adjacent Wall of said presser ring and tending to press said ring into concentric position on said member.

In Witness whereof I have subscribed my name.

HAROLD MCGOVVAN.

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