US1790339A - Picker roll - Google Patents

Description

Jan. .27, 1931. R. J. A. CHANDLER 1,790,339

PICKER ROLL Filed Oct. 31, 1929 Fig. l.

i o 5 a o B 8 a 9 6 e 0 o o o o -6 -o o o a a e o a v INVENT .%a r %g g t ATTORNEY Patented Jan. 27, 1931 1 UNITED STATES PATENT, OFFICE ROBERT J. A. cHANnLnaoR LONDON, ENGLAND, AssreNoR r0 AMERICAN MAcHrNE & roUNnRY COMPANY, A CORPORATION on NEW JnRsnY PIoKRR ROLL Application filed October 31, 1929. Serial No. 403,872.

This invention relates to an improvement in a picker roll for machines for feeding or carding tobacco and similar substances.

Picker rolls are known in which the roll proper is constructed of a steel tube, andin which pins are driven into holes in the wall of said tube. But when replacing broken or otherwise damaged pins from such a tube, the operation of removing the old'pins, which are as hard as the tube, frequently results in enlarged or otherwise damaged holes in which new pins will not fit properly.

The production of means whereby this difliculty is overcome is the main object of the present invention, and in carrying the invention into effect the pins are made slightly smaller than before, or the holes are made slightly larger than before, and the pins are provided with a corresponding coating of some metal which is softer than that of the tube, so that the operation of drivingthe pins in and out of their holes will not resultin enlarging or otherwise damaging the latter. With this end in view, the invention consists in certain constructions and combinations which will be hereinafter fully described and then specifically set forth in the claims hereunto appended. I i

In the accompanying drawings, in which like characters of reference indicate the same or like parts, Fig. 1 is a side elevation, partly in section, of a picker roll constructed in accordance with'the invention; Fig. 2 is an end elevation of the structure shown in Fig. 1; Fig. 3 is an enlarged cross sectional View of a fragment of the tube shown in Fig; 1, showing a drilled and rounded hole ready to re ceive a pin; and Fig. 4 is a similar View, showing a coated pin in operative position.

Referring to the drawings, 5 indicates a roll proper which is constructed of a steel .or other metallic tube provided with symsoft coating from the pins as they are driven into operative position.

To replace a broken or otherwise damaged pin, the old pin is driven. inwardly through its hole 6 into the interior of the tube 5, from which it is removed and discarded. The coating of the pin being softer than the metal ofthe tube 5, the former yields and thehole.

is not enlarged or otherwise damaged during the pin removingoperation. A new pin is then driven into the hole, and since it also is coated with soft metal it cannot damage the wall of the hole.

' What is claimed is:

1. A picker roll comprising a relatively hard metallic tube having holes extending through its wall,'and pins coated with a relatively soft metal and snugly fitting said holes.

2. A picker roll'comprising a. relatively hard metallic tube having holes extending through its wall and each rounded off at the outer surface of the tube, and'pins coated witha relatively soft metal and snugly fitting said holes.

In testimony whereof, I have signed my name to this specification.

ROBERT J. CHANDLER.

metrically arranged holes 6 ext-ending I through the wall of the tube for the reception of picker pins. picker pins 7 each comprising a. base 8 of steel and a coating 9 of lead, copper, or other metal which is softer than the metal of thetube 5. The holes Gare rounded oft at 10, at the outer surface of the tube 5, to avoid stripping the Driven into these holes 6 are

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