US1725176A - Shredding machine - Google Patents

Description

R. E. BEVIS Aug. '20, 1929.

SHREDDING MACHINE Filed Jan. 18, 1928 2 SheetsSheet INVNTOR.

R. E. BEVIS Aug. 20, 1929.

SHREDDI'NG MACHI NE 2 Sheets-Sheet Flied Jan. 18, 1928 ATTORNEY nm 9% w Patented Aug. 20, 1929.

UNITED STATES REXFORD E. BEVIS, OF FRANKLIN, OHIO.

SHREDDING MACHINE.

Application filed January 18, 1928.

Serial No, 247,718.

This invention} relates to improvements in it passes between the cutting discs, thus actshredding machine.

In the accompanying drawings, which serve for illustrating the invention: Fig. 1 is a view in vertical section of the improved shredding machine;

Fig. 2 is a plan view of the same; Fig. 3 is a view of the machine in cross section;

Fig. 4 is a detail View of the shredders. Machines of the characten here shown are commonly used for shredding sheet material, as paper, paper board, fabrics, leather, etc.

The objects attained in the improved machine consist in the addition of devices for removing from the cutting and cleaning rings the accumulation of wax, parafline, and other adhering substances contained in various kinds of the shredded material. The accumulation of such substances on the shred ding mechanism, without means employed for removing the same, as in the common practice, causes the shredded material to stick to the mechanism and thus to retard and generally to interfere with normal operation and production of the machines. In shredding stock containing a high percentage of adhering substances, practical reduction of the stock becomes impossible because of such obstruction of the mechanism.

' The shredding machine, as shown in the drawings for illustrating the invention, consists generally in a frame structure 1, 1n which opposite sets of cutting and cleaning rings 2,3 are suitably supported, the material being moved to the shredding mechanism over a feed table 4. These features of the machine, are substantially the same in arrangement and operation as in machines of this character in common use.

The upper and lower sets of discs 2 and cleaning rings 2 are so related one to the other that the edges of opposite discs 2 overlap for eflecting the cutting or shredding action on the stock as it is fed between the discs from table 4. The cleaning discs 3 are free fitting between cutting discs and have a floating, rolling movement over the stock as ing to prevent clogging of the stock between the cutting discs. This relative movement between the cutting discs and cleaning rings, due to the contact between the lateral edges .of the rings with the adjacent faces of the discs, also serves for preventing or minimizing the accumulation of adhering substances from the stock on the cutting discs.

The improvements consist in a series of metal rolls 5678, as'here shown, supported on shafts 9101112, operable in bearings 13141516 in the main frame structure of the machine. Roll 5 is driven from the shaft 17, which supports the upper set of cutting and cleaning rings 23, through a gear connection 181920-21, roll 7 being driven from the same shaft through a similar gear connection 1822 2324. Lowerrolls 68 are driven in like manner from shaft 25, which supports the lower set of cutting and cleaning rings 28, through gear connections 26-'2 72829 and 2630-31-32 respectively. Shafts l7-25 are operably connected one with the other on the opposite side of thefmachine by gears 33-34, the machine as a whole being 75 driven by any suitable connection to the source of power. The intermediate sets of gears 19-20, 22-23, 2728 and 3031 are each, supported adjustably in elongated bearings 35 to compensate for variations in the gear groups of which the respective sets form apart.

The cutting rings or discs 2 are keyed on shafts 1725 as indicated at 36 the cleaning rings 3 being larger in diameter and ar- '85 ranged alternately with and floatingly between the cutting rings, thus the former op erate eccentrica-lly to shafts 1725, and have a wiping action over the side edges of the cutters, which acts, in the shredding of stock free of adhesive substances, to prevent clogging of the mechanism by the shredded material. In shredding stock, however, coated with wax or paraffine, or containing other substances, which adhere to the mechanism, the cuttersv and cleaning rings become clogged with an accumulation of such substances and the shredded material which sticks to it, and accordingly interferes with the production, both in the output of the machine and in the quality of'the product produced.

The cleaning rolls 56-78, comprised inthe invention, act by contacting on opposite sides with each set of mechanisms 2-3 to prevent, or to minimize, the accumulation of adhesive substances in the shredding mechanism, and thus to maintain normal production conditions of the machine.

The cleaning rings 3 have floating contact on their opposite sides with the adjacent cutting discs 2, thus there is relative movement to the extent of the eccentricity of rings 3 between discs 2 and rings 3 in their rolling contact with the cleaning rolls 5, 6, 7, 8 which causes the lateral edges of rings 3 to traverse the faces of discs 2 in a cutting or scraping action which breaks upand dislodge-s the formation of substances of the stock which adhere to discs 2, the accumulation of 'whichotherwise interfers'with the normal functioning of the cutting discs. The rolling action of discs 2 and rings 3 with rollers 5, 6, 7, 8 also acts to prevent adhering of such substances to the peripheries of rings 3 which are kept clean by the frictional action of the rollers.

In some cases, according to the character of the shredding stock, the machines are further provided with a series of air jets 37, connected to any suitable air pressure line, which act to blow the substances dislodged or broken up by the cleaning rolls, fromthe mechanism, the air currents being directed, as shown, from opposite sides toward the center of the machine.

While the mechanism for cleaning the shredding mechanism consists in the preferred form, as herein shown anddescribed, in the rolls 56-78, I claim as my invention any suitable mechanism, as scrapers,

brushes, or other mechanical devices which may be substituted for the rolls forperforming the same function, the improvement comprised in the invention being the first, as far asI am aware, in any form applied on a shredding machine of this character.

- The cleaning rolls may be made ineither "brass or steel, or of any suitable material. A

slight clearance (about .002") is provided between the peripheries of the rolls and the cutters. Roll 8, as here shown, is substantially larger than rolls 5--67 for accelerating the discharge of the shredded. product.

Having described my invention, I claim: 1. Shredding mechanism of the character described including a plurality of rotatable cutters spaced one from another" axially, a plurality of rotatable cutters arranged alternately between the aforesaid cutters, ec= centric to the axis thereof, and having floatfor removing adhering substances therefrom.

2. Shredding mechanism of the character described including a plurality of rotatable cutters spaced one from another axially, a plurality of rotatable cutters arranged alternately, between the aforesaid cutters, eccentric to the axis thereof, and having floating radial movement to the extent of their eccentricity, in combination with a device coacting frictionally with the peripheries of said cutters for removing adhering substances therefrom.

3. Shredding mechanism of the character described including a plurality of rotatable cutters spaced one from another axially, a

plurality of rotatable cutters arranged alternately, between the aforesaid cutters, eccentric to the axis thereof, and having floating radial movement to the extent of their eccentricity, in combination with a device coacting frictionally with the peripheries of said cutters for removing adhering substances and means for directing air blasts upon said mechanism for blowing said dislodged substances therefrom.

4. Shredding mechanism of the character 5 described including a plurality of rotatable cutters, spaced one from another axially, a plurality of rotatable cutters arranged alternately between the aforesaid cutters, eccentric to the axis thereof, and having floating radial movement to the extent of their eccentricity, in combination with a roll coacting' at a different speed with the peripher ies of said cutters for removing adhering substances therefrom.

5. Shredding mechanism of the character described including a pluralitg of-rotatable cutters spaced one from anot er axially, a plurality of rotatable cutters arranged alternately between the aforesaid cutters,'eccentric to the axis thereof, and having floating radial movement to the extent of their eccentricity, in combination with 'a roll operably geared with said cutters at a different speed and coacting with. the peripheries thereof for removing adhering substances therefrom.

6. Shredding mechanism of the character described including a plurality of rotatable cutters spaced one from another axially, a plurality of rotatable cutters arranged alternately between the aforesaid cutters, eccentric to the axis thereof, and having floatlng radial movement to the extent of their eccentricity, in combination with a roll coacting with the peripheries of said cutters for effecting the radial movement of the floating cutters and removing adhering substances from the cutters.

7 Shredding mechanism of the character described including a plurality of rotatable cutters spaced one from another axially, a plurality of rotatable cutters of'larger diameter than the aforesaid cutters, arranged alternately therebetween, eccentric to the axis thereof, and having floating movement to the extent of their eccentricity, in combination with a roll coacting with the peripheries of the cutters for effecting the floating movement of the eccentric cutters and removing adhering substances from the cut- 10 ters.

In testimony whereof, I aflix my signature.

REXFORD E. BEVIS.

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