US1555236A

US1555236A - Doffing apparatus for mangles

Info

Publication number: US1555236A
Application number: US519471A
Authority: US
Inventors: William J Asher
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-12-02
Filing date: 1921-12-02
Publication date: 1925-09-29
Anticipated expiration: 1942-09-29

Description

Sept. 29, 1925.

W. J. ASHER DOFF-ING APPARATUS FOR-ANGLES Filed Dec. 2; 1921 [fix/6mm,

Patented Sept. 29, 1925.

UNITED STATES WILLIAM J. ASHER, OF COLORADO SPRINGS, COLORADO.

DOFFING APPARATUS FOR MANGLES.

Application filed December 2, 1921. Serial No. 519,471.

To all whom it may concern:

Be it known that I, WILLIAM J. AsHER, a citizen of the United States, and residing at Colorado Springs, El Paso County, State of Colorado, have invented certain new and useful Improvements in Dofiing Apparatus for Mangles, of which the following is a specification.

This invention relates to laundry ironing machines or mangles of the rotary drum type and particularly to the doffing mechanism for continuously removing the work from the rotating drum.

One object of the invention is to provide an improved bar for supporting the doffing knives which may be quickly and easily removed from the machine for the purpose of adjusting the knives or replacing one or more of the dotting tapes. To this end the dofling bar is mounted in the frame in'a novel manner so that it may be withdrawn without difficulty from its operative position, to a position in which the knives may be reached by the operator and replaced with ease. By thus displacing the doffing bar renewal of the doffing tapes may also be accomplished. Another feature of the invention resides in the novel manner in which the dofling knife supporting arms are pivotally connected to the doffing bar. Additional objects and advantages of the present invention reside in the simple construction of the dofiing bar and knife holding arms, enabling the same to be made more cheaply than theretofore.

The invention will be fully set forth in the following description when taken in connection with the accompanying drawings in which:

Figure 1 is a section through a portion of a rotary drum mangle showing the improved dofiiug bar construction;

Figure 2 is a section on the line 2-2 of Figure 1;

Figure 3 is a plan view of one end of the dofling bar showing the means for supporting this end in the frame; and

Figure 4: is an enlarged sectional View through the doffing bar and a doffing knife.

The type of mangle to which. this invention is especially adapted to be applied is described and illustrated in my Patent No. 1,354,871 dated October 5, 1920. It will be understood, however, that the invention is applicable to other types of rotary drum mangles and is not limited in its application and the drum 11 is mounted for rotation in,

this frame. Rollers 12, 13 and 14, the axes of which are parallel to the axis of the drum, are mounted at one side thereof and extending around the rollers 12 and 13 and around the drum is an endless apron 15 which moves with the drum in the direction of the arrow and serves to hold the work against the drum in its rotation. Rollers 13 and 14 are supported by levers L and M respectively, these levers being in turn pivoted on the frame and adapted to be manually manipulated to raise and lower the rollers, as described in my prior patent. The work is fed in between the roller 12 and the short endless dofiing tapes 16 which pass under the wedge-shaped dofling bar 17 and over the roller 14. After having passed around the drum the work is removed therefrom by the dofiing knives 18 in well known manner, and the dofiing knives are kept clear by the action of dofling tapes 16 and the endless apron 15 which grip the work between them and carry it around the roller 13. It is then carried over the machine tothe oppo site side thereof on the upper turn of the endless apron 15.

The dofiing knives 18 are T-shaped and have their stems secured to knife carrying arms 19 by screws 20. Small screws 21 are provided for adjusting the angle of the dofiing knives relatively to the arms 19, so that their edges may bear equally against the drum 11. Rectangular openings are left between the stems of the knives and arms 19 and through these openings the dofling tapes 16 extend.

The dofling bar is triangular or wedgeshaped in cross section and is provided with the upwardly projecting flange 17 the inner face of which comprises an abutment against which the outer or rear edge of each of the knife holding arms 19 is adapted to bear. Each of the knife holding arms is formed with a recess in its rear edge at one end, and pins 23 secured to and extending upwardly from the upper surface of the doffing bar adjacent. the flange 17 fit loosely in these recesses and comprise means for separating and preventing longitudinal displacement of the arms 19. In the opera:

llU

tion of the mangle the arms are fr:;e to move or pivot about their rear edges to allow the knife edges to move inwardly or outwardly to compensate for inequalities in the surface of the rotating drum.

The dofling bar is supported at its ends (only one of which .is illustrated) in bracket 24 secured to the frame, each bracket having an inwardly extending flange 25 and an aperture 26 adapted to receive the pin 27. The flange 25 is cut away as shown at 28 but has upper and lower bearing

surfaces

29 and 30 respectively, against which one face of the dotting bar rests. Another face of the dofling bar rests against the fiat face 31 of the pin 27 and the end of the bar is adapted to engage the inwardly facing shoulder 32of the pin 27, when the bar is in position, thereby locking the pin in the aperture 26. The bar is therefore wedged by its own weight in between the flange 25 and pin 27, which together comprise a supporting cradle.

The bar may be removed in either of two ways, by lifting the rollers by means of the levers and then lifting the bar from its supporting cradle, or by removing the pins 27 In removing thebar by the second method mentioned it is only necessary to raise it slightly to disengage its ends from the shoulders 32 of pins 27, which may then be easily withdrawn from recess 26. After the removal of the pins the bar may be lowered or drawn outwardly away from the drum for the purpose of replacing one or more of the dofiing tapes 16. For the purpose of facilitating the removal of the pin 27 an aperture 33 is provided in the bracket so that an instrument may be inserted therethrough to contactwiththe end of the pin to force it from the socket 263.

By employing the above described means for supporting the bar in the frame it can be quickly removed, and as quickly replaced in'position. The shape of the bar with the projecting flange 17 is such that-it may be made of cold rolled steel instead of cast steel, as heretofore; the pins 23 being inserted after thebar hasbeen cut to length and avoiding the necessity of having special ears formed integral with or secured to the bar for the purpose of pivotally supporting the arms 19, which construction has been heretofore used. It will be obviousto those skilled in the art that the design and arrangement of parts of the invention may be varied and the invention is not limited therefore to the exact embodiment described.

Having thus described the invention what I claim as new and desire to secure by Letters Patent is:

1. In a mangle, in combination, a frame, a rotary drum, dofling means for removing the work from the drum, including a doffing bar having its axis parallel to the axis of the drum, and means for removably supporting the bar in the frame, said means including a two-part cradle upon which one end of the bar rests, one portion of the cradle being rigidly secured to the frame and the other portion being detachably secured thereto so that it may be readily removed to allow the bar to be lowered.

2. In a mangle, in combination, a frame, a rotary drum, dofling means for removing the work from the drum, including a dotting bar having its axis parallel to the axis, ofthe drum and being wedge-shaped in cross section, and means for removably supporting the bar in the frame, said means including a member rigidly secured to the frame and a member detachably secured to the frame, one end of thebar resting on and extending downwardly between both of said members and being supported thereby,the detachable member being adapted to bereadily detached so that the bar may be removed.

3. In a. mangle, in combination, a frame, a rotary drum, dofiing means for removing the work from the drum, including a'doiiing bar having its axis parallel to the axis of the drum, andmeans for removably supporting the 'bar in the frame, said means including a member rigidly secured to the frame and a pin fitting in an aperture in the frame, said member and pin both extending laterally from the frame and adaptedto'jointly support one end of the bar, said pin and bar having mutually engaging portions whereby the pin is locked in supportinn position when the bar is resting thereon "'ut is released when the bar is raised, WhGIEHPOIl'll] may be removed fromthe aperture and the bar lowered.

4L. In a mangle, in, combination, a frame, a rotary drum, doffing means forremoving'the work from the drum, including a wedgeshaped dofiing bar having its aXislPar-allel'to the axis of the drum, and means for removably supporting the bar inthe 'frame,said means including a flange extending laterally from the frame and pin spaced therefrom and removably supported in an aperture in the frame, the bar being wedged between said pin and flange and supported thereby but adapted to be lowered when the pin'is removed.

5. In a mangle, in combination, a rotary drum, and means for doffing the work from said drum, said means including a bar having a substantially vertical abutment facing the drum, a pin secured to the bar in front of the abutment and extending vertically upwardly, and a knife carrying arm having its rear edge bearing against said abutment and extending toward the drum, said arm having an aperture adapted to receive the upwardly projectingpin but beingfreelyremovable at all times from said bar.

6. In a mangle, in combination, a rotary drum, and means for dotting the Work from said drum, said means including a bar having an abutment facing the drum, a knife supporting arm having a portion bearing against said abutment and having a notch in one end, a pin secured to said bar and extending through said notch, and a second pin secured to said bar and positioned adjacent the opposite end of said arm.

7. In a mangle, in combination, a rotary drum, and means for dofiing the Work from said drum, said means including a bar having an abutment facing the drum, a series of knife supporting arms having portions bearing against said abutment and pins secured to said bar and extending between the adjacent ends of the knife supporting arms to hold the same in spaced relation.

In testimony whereof I hereunto affix my signature.

WILLIAM J. ASHER.