Method of manufacturing the body of a neck-in can and an apparatus used therefor

Claim 1

An apparatus for shaping the body of a neck-in can which comprises a burr crushing means and a means to support a cylindrical body with a bottom end provided coaxially below said burr crushing means, said burr crushing means consisting of a fixed shaft; an annular ring rotatably and concentrically mounted around the circumference of the lower portion of said shaft; said ring having the outer diameter slightly smaller than the inner diameter of the cylindrical body to be worked and having a sloping portion on the upper peripheral edge thereof converging toward the axis of said shaft; an annular resilient body above said ring tightly surrounding around said fixed shaft, a part of said resilient body projecting radially and outwardly from said shaft; an annular ring intimately engaged with the circumference of said resilient body, said ring having a projecting flange on the lower and inner end thereof, the upper surface of which flange is brought into contact with the lower projecting surface of said resilient body, the upper end surface of said ring being placed slightly lower than that of said resilient body; an inverted truncated conical roll rotatably fixed on the lower projecting portion of a shaft, said shaft being inserted through the respective holes pierced at suitable positions on said annular ring, the sloping portion of said roll having the same sloping angle as that of the sloping portion of the upper portion of said annular ring, at least a part of said sloping portion of the former contacting softly with said sloping portion of the latter and another part of said sloping portion of the former projecting downwardly from said sloping portion of the latter; and a means fixed around said fixed shaft and adapted for locking said resilient body; said means to support a cylindrical body consisting of a stand capable of rotating and moving up and down by a suitable means and a means to suck and fix said cylindrical body on said stand.

Claim 2

An apparatus for shaping the body of a neck-in can which comprises a burr crushing means and a means to support a cylindrical body with a bottom end provided coaxially below said burr crushing means, said burr crushing means consisting of a fixed shaft; an annular ring rotatably and concentrically mounted around the circumference of the lower portion of said shaft; said ring having the outer diameter slightly smaller than the inner diameter of the cylindrical body to be worked and having a sloping portion on the upper peripheral edge thereof converging toward the axis of said shaft; an annular resilient body above said ring tightly surrounding around said fixed shaft, a part of said resilient body projecting radially and outwardly from said shaft; an annular ring intimately engaged with the circumference of said resilient body, said ring having a projecting flange on the lower and inner end thereof, the upper surface of which flange is brought into contact with the lower projecting surface of said resilient body, the upper end surface of said ring being placed slightly lower than that of said resilient body; an inverted truncated conical roll rotatably fixed on the lower projecting portion of a shaft, said shaft being inserted through the respective holes pierced at suitable positions on said annular ring, the sloping portion of said roll having the same sloping angle as that of the sloping portion of the upper portion of said annular ring, at least a part of said sloping portion of the former contacting softly with said sloping portion of the latter and another part of said sloping portion of the former projecting downwardly from said sloping portion of the latter; and a means fixed around said fixed shaft and adapted for locking said resilient body; said means to support a cylindrical body consisting of a stand capable of rotating and moving up and down by a suitable means and a means to suck and fix said cylindrical body on said stand.

Claim 8

An apparatus for shaping the body of a neck-in can which comprises a burr crushing means and a means to support a cylindrical body with a bottom end provided coaxially below said burr crushing means, said burr crushing means consisting of a fixed shaft composed of the upper stationary shaft and the lower fixed member; a rotary ring rotatably and coaxially mounted around the lower portion of said upper stationary shaft; a driving means to rotate said rotary ring; an annular resilient body intimately engaged with said ring, a part of said body projecting radially and outwardly from said lower fixed member; an annular ring intimately engaged with the circumference of said resilient body, said ring having a projecting flange on the lower and inner end thereof, the upper surface of which flange is brought into contact with the lower projecting surface of said resilient body, the upper end surface of said ring being placed slightly lower than that of said resilient body; and inverted truncated conicall roll rotatably fixed on the lower projecting portion of a shaft, said shaft being inserted through the respective holes pierced at suitable positions on said annular ring; said lower fixed member having the outer diameter slightly smaller than the inner diameter of the cylindrical body to be worked and having a notched portion obliquely cut at a predetermined position around the circumference of the lower body thereof, the sloping surface of said notched portion being consistent with that of said roll, at least a part of the sloping surface of said roll contacting softly with that of said roll, another part of the sloping surface of said roll extending outwardly from said notched portion; said means to support a cylindrical body consisting of a stand capable of moving up and down by a suitable means and a means to suck and fix said cylindrical body on said stand.

Claim 9

An apparatus for shaping the body of a neck-in can which comprises a burr crushing means and a means to support a cylindrical body with a bottom end provided coaxially below said burr crushing means, said burr crushing means consisting of a fixed shaft composed of the upper stationary shaft and the lower fixed member; a rotary ring rotatably and coaxially mounted around the lower portion of said upper stationary shaft; a driving means to rotate said rotary ring; an annular resilient body intimately engaged with said ring, a part of said body projecting radially and outwardly from said lower fixed member; an annular ring intimately engaged with the circumference of said resilient body, said ring having a projecting flange on the lower and inner end thereof, the upper surface of which flange is brought into contact with the lower projecting surface of said resilient body, the upper end surface of said ring being placed slightly lower than that of said resilient body; and inverted truncated conicall roll rotatably fixed on the lower projecting portion of a shaft, said shaft being inserted through the respective holes pierced at suitable positions on said annular ring; said lower fixed member having the outer diameter slightly smaller than the inner diameter of the cylindrical body to be worked and having a notched portion obliquely cut at a predetermined position around the circumference of the lower body thereof, the sloping surface of said notched portion being consistent with that of said roll, at least a part of the sloping surface of said roll contacting softly with that of said roll, another part of the sloping surface of said roll extending outwardly from said notched portion; said means to support a cylindrical body consisting of a stand capable of moving up and down by a suitable means and a means to suck and fix said cylindrical body on said stand.