BLANK WRAPPING MECHANISM AND METHOD FOR FRUSTO-CONICAL CUP-MAKING MACHINES

• US 3,745,891 A
• Filed: 08/05/1971
• Issued: 07/17/1973
• Est. Priority Date: 08/05/1971
• Status: Expired due to Term

• Current Assignee: Raymond E. Bodendoerfer
• Original Assignee: Raymond E. Bodendoerfer
• Inventors: Bodendoerfer, Raymond E.
• Primary Examiner(s): Juhasz, Andrew R.
• Assistant Examiner(s): Coan, James F.
• Application Number:
  US05/169,452
• Time in Patent Office: 712 Days
• Field of Search: 93/36.1,39.1,39CD,39.3,41,77,94
• US Class Current: 493/154
• CPC Class Codes: B31B 50/00 Making rigid or semi-rigid containers, e.g. boxes or cartons
• CPC Class Codes: B31B 50/28 around mandrels, e.g. for forming bottoms

Abstract

A machine for making two-piece paper cups including individually actuated folding wings for wrapping the blank around a frustoconical mandrel. The wings are actuated by cams which swing the folding wings rapidly through the initial wrapping phase without applying any appreciable clamping pressure, and then apply a final squeezing action to the blank against the mandrel just prior to the sealing of its longitudinal seam. A method of wrapping a blank around a mandrel with a fast initial wrapping action followed by a final squeezing of the blank tightly against the mandrel.

Claims

1. A high speed two-piece paper cup-making machine comprising, tapered mandrel, a pair of wrapping wings for shaping the body blank around the mandrel, said wings being mounted on a common shaft which is located centrally beneath said mandrel, each of said wings being of one piece construction, one of said wings operating in advance of the other to overlap the longitudinal edges of the blank;

means for operaring said wings and comprising a rotatable cam member for each of said wings, each of said cam members having gear teeth around their periphery, the teeth one cam member meshing with the teeth of the other cam member for providing timed relationship between said cam members, each of said rotatable cam member having a cam track therein, said cam tracks each having a rise portion for causing an intitial fast wrapping action of said wings so as to cause said blank to be wrapped around said mandrel without any appreciable clamping pressure, said cam tra ks each also having a subsequent mandrel squeezing portion for them causing said wings to apply a final squeezing action to said blank round said mandrel, and linkage means for each cam member and including a cam follower engageable in its respective cam track and connecting each of said cam members with its respective wing.