DEVICE FOR THE MANUFACTURE OF PAPER CUPS

• US 3,855,908 A
• Filed: 06/05/1973
• Issued: 12/24/1974
• Est. Priority Date: 06/06/1972
• Status: Expired due to Term

• Current Assignee: Fritz Wommelsdorf, Werner Schmidt
• Original Assignee: Fritz Wommelsdorf, Werner Schmidt
• Inventors: Schmidt, Werner, Wommelsdorf, Fritz
• Primary Examiner(s): Lake, Roy
• Assistant Examiner(s): Coan, James F.
• Application Number:
  US05/367,156
• Time in Patent Office: 567 Days
• Field of Search: 93/36.1,36.3,36.5R,36.5SS,36.8,39C,39.1R,39.2,39.3,55.1R,59R,59CE,94FC
• US Class Current: 493/109
• CPC Class Codes: B31C 7/06 and inserting into a cone end a bottom to form a container
• CPC Class Codes: B31F 1/0083 Closing
• CPC Class Codes: B65D 3/06 essentially conical or frusto-conical
• CPC Class Codes: B65D 3/12 Flanged discs permanently secured, e.g. by adhesives or by heat-sealing

Abstract

A device in which a conic-shaped mantle and a cup-shaped bottom portion are assembled on a conic-shaped pin by a mantle seam sealing operation, and a placement of the bottom portion within the narrower end of the mantle, projecting beyond the pin, in flanged interlocking relationship. In the sealing operation a movable member is associated with the pin to be extensible along the seam line of the mantle which is received over the pin and has a portion extending beyond the pin, so as to provide an abutment surface at this portion against which a pressing member urges the mantle at the seam line. After this movable member is retracted another member places the bottom portion in position in the mantle and a still further member urges the bottom portion and mantle into interlocking relationship.

Claims

1. In a device for the manfacture of cups of paper or similar material, the cups consisting of a conic-shaped mantle and with a cup-shaped bottom portion inserted into the mantle with the side edges pointing toward the narrower end of the mantle and with the outer surface of the bottom portion being joined to the inner surFace of the mantle, the improvement which comprises:

a. a conic-shaped pin adapted to receive a conic-shaped mantle in overlying relationship thereon, said mantle, when so received, partially extending beyond said pin at the narrower face thereof, said mantle having a seam portion extending along the length thereof;

b. a pressing cheek movably disposed adjacent said conic shaped pin and opposite said seam portion of said mantle;

c. means movably disposed to be moved adjacent the seam portion at the edge extending beyond said pin and within said mantle opposite said pressing cheek, whereby said seam portion is supported by an abutment surface, in relationship to said pressing cheek, along said pin and along said means.

2. A device as defined in claim 1 wherein said means is a strip disposed in a groove in said pin at the peripheral surface thereof, said strip having a surface conforming to the surface of said pin, and said strip being movable between a position in which it is completely confined within said pin and a position wherein a portion thereof extends beyond the narrower end of said mantle.

3. A device as defined in claim 1, wherein said means is disposed adjacent the narrower end of said pin and is adapted to be moved into contact therewith, said means having a shoe thereon which, when said means contacts said pin, extends along the seam line above said narrower end of said pin and provide an abutment surface, in conjunction with the surface of said conic-shaped pin, against which the seal line can be pressed by said pressing cheek.

4. A device as defined in claim 1, further comprising second means disposed adjacent the narrower end of said pin and movable axially of said pin to deposit a bottom portion of the cup upon the narrower face thereof when said means are displaced from abuting relationship with the seam line above said narrower face, said bottom portion, when said deposited, having the bottom wall in contact with said narrower face and said side edges extending adjacent to the inner surface of said mantle.

5. A device as defined in claim 4 further comprising a third means movable axially of said pin and toward said portion of said mantle extending beyond said narrower face and said side edges of said cup-shaped bottom portion, said third means being adapted to move, after said second means is retracted from within said mantle, against said portion of said mantle and said side edges of said cup-shaped bottom portion extending beyond said narrower surface of said pin to urge said portion and said side edges into a flanged interlocking position.