US1149155A - Curling-die for packages. - Google Patents

Description

mgwww A. B. STARR.

CURLING DIE FOR PACKAGES. APPLICATION nuzo NOV- 22, 1912.

Patented Aug. 3, 1915.

ALDEN B. STARR, OF NEW YORK, N. Y., ASSIGNOR TO JOHN MARKI'QE, OF JEDDO, PENNSYLVANIA.

CURLING-DIE FOR PACKAGES..

To all 10h am it may concern:

Be it known that I, ALDEN B. STARR, a citizen of the United States, residing at the city of New York, in the borough of'Manhattan and State of New York, have invented certain new and useful Improve ments in Curling-Dies for Packages, of which the following is a full, clear, and exact description.

This invention relates to dies for curling the projecting edge or flange of a receptacle or package, which surrounds the bottom or closing disk thereof, whereby said edge or flange will'be strengthened and the bottom disk supported in place.

In the Patent #981,067, granted F ebruary 11, 1911, there is shown a die having an annular forming groove in its working face which is protected from wear occasioned by the frictional contact between the rapidly rotating die and the rough edge of the receptacle, by a series of pins radially disposed with respect to the axis of the die. These pins have transverse grooves intermediate their lengths, of the same shape as the groove in the die, and are positioned in the die-with the walls of their grooves alining with the walls of the forming groove, but with the bottom surfaces thereof inclined slightly to the bottom surface of the said groove. The pins thus receive the brunt of the wear on the die. It has been found, however, that since the wear occurs almost entirely upon the surface which first comes in contact with the edge of the package, the grooves in the pins become worn after a comparatively few packages have been acted upon, and in order to prevent the forming groove in the die from becoming worn and thus rendering the die worthless, it is necessary to frequently supply an entire new set of pins which must be accurately machined and adjusted in the die in order to properly curlthe edges of the receptacles.

My invention consists in locating the grooves in the ends of the pins and mounting the pins in the die so that the wear will be in a longitudinal direction with respect to the pins, so that by a longitudinal adjustment of the pins, the Wear is compensated and the pins will last an indefinite time.

In the form illustrated, I have shown a die adapted to be used with a type of bottoming machine disclosed in my applica- Specification of Letters Patent.

Patented Aug.3,1915.

Serial No. 802,360.

tion Serial N 0. 793,987, filed October 8, 1913,

but the invention is not limited to use with machines such as is described therein, but

is capable of broad application with dies such as are disclosed in the Patent No. 981,067 above. referred to, as well as with other forms of dies of a similar nature not specifically referred to.

In the drawings, Figure 1 is a plan view of a die embodying my invention; and Fig. 2 is a central vertical section of the die through the pins, :1 part of one of the pins being removed to. show th groove in the die. The die 1 consists of a block of steel or other suitable material having a threaded socket 2 in its upper face and a cylindrical recess 3 in its lower face, the socket and recess being connected by a circular opening of less diameter than either, providing an annular flange 4 against which the shaft Y5 (not shown) which carries the die, bears. An annular groove 5 is formed in the bottom and at the periphery of the cylindrical recess 3 into which the edge of the package is received in order that it may be curled or crimped thereby. 1

Extending from the top surface of the die to the groove 5 are a plurality of cylindrical recesses 7 which are of slightly greater diameter than the width of this groove, and, as shown, are preferably arranged parallel to the axis'of the die with a portion of each recess located on each side of the groove. Pins 8 of hardened steel having depending portions 9 projecting proper position in the die; that is, the face 11 is arranged so that the inner surface of the depending portion 9 of the pin, will be substantially flush and even with the cylindrical surface of the recess 3 and the surface of the groove 10 in the pin, alining with 3% the surface of the groove 5. In the preferred construction, however, the pins are arranged with the bottoms of their grooves projecting slightly beyond the bottom of the groove '5. To prevent the tearing of the no Y edge of the receptacle, by the sharp edges of the pins, I find it desirable to bevel the edges of the surfaces of the depending portion 9 and of the groove 10.

If we assume that a die of this character is being rotated rapidly and is brought down over the edge of the receptacle, said edge will first contact with the cylindrical surface of the recess 3, and the corresponding surfaces on the depending portions 9, the latter'preventing undue wear of these surfaces. \Vhen the die is pressed down upon the edge of the package, the pressure necessary to curl this edge is relatively great, and the wear which would occur on the groove 5 due to the cutting action occasioned by the frictional contact between the rough edges of the package and the walls of the groove 5, will occur on the pins since they project slightly beyond the surface of the groove in the die. These pins being of hardened steel will better withstand this cutting action and as the shape of the grooves in the pins corresponds to that of the groove in the die, the edge of the package will be properly curled inwardly.

When the grooves in the pins become worn, it is apparent that by merely loosening the set-screws, the pins can be advanced to again bring the surface of their grooves so that they will project slightly beyond the surface of the groove in the die and thus avoid the necessity for replacing the pins each time they are worn.

While I have described my invention with the surfaces of the groove 10 in the pins projecting slightly beyond the surface of the groove 5 in the die, yet the amount which the pins project is necessarily small and I deem the term substantially which is used in the claims annexed hereto to be sufficiently broad to cover this construction, as well as one in which the surface of the grooves in the pins and die are flush.

Having described my invention, I claim:

1. A rotary die provided with a circular groove arranged in a plane transverse to the axis of rotation and carrying a series of wear-resisting bodies exposed in said groove, said bodies being rigidly mounted in said die in fixed relation to said groove and adjustable, in a direction parallel to the axis of rotation to expose fresh portions of the wear-resisting bodies when wornfrom the curling operation.

2. A rotary die provided with a circular groove arranged in a plane transverse to the axis of rotation and. carrying a series of wear-resisting bodies exposed in said groove, said bodies being rigidly mounted in said die in fixed relation to said groove and adjustable in a direction parallel to the axis of rotation to expose fresh portions of the wear-resisting bodies when worn from the curling operation, the exposed portions of said bodies being shaped to conform to the- 4. The combination with a curling die having an annular groove in one face thereof, of a plurality of pins in said die having grooves in the ends thereof corresponding in shape to the groove in the die, said pins being adjustable in a direction substantially parallel to the axis of rotation of the die..

5. The combination with a curling die having an annular groove in one face thereof, of a plurality of pins in said die having grooves in the end faces thereof corresponding in shape to the groove in the die and arranged substantially flush therewith, and means for adjusting the position of said pins within said die When they become worn from the curling operation.

6. The combination with a curling die havin a cylindricalrecess in'one face thereof an an annular groove in the face of said recess, the surface of said groove and the curved surface of said recess being contiguous, of a pin in said die having a groove in the end face thereof and a member depending from said end face having a surface contiguous with the surface of said groove, and means for positioning said pin in said die with the above-named surfaces of' the pin substantially flush with the above-namedsurfaces of said die.

In witness whereof, I subscribe my signature, in the presence of two witnesses.

- ALDEN B. STARR.

Witnesses:

WALDO M. CHAPIN, REUBEN Lonnn.

Images