Method and apparatus for closing open end of carton blank
AssigneeInternational Paper Company
InventorsGeorge A. Morden, Cletus E. Kreher
Life of this patent
Estimating the term…
Abstract
A carton closure system including a cam having a rear face and a camming surface opposite the rear face, the cam being mounted for linear reciprocation between a position wherein there is applied pressure against partially infolded portions of the end side walls of a carton blank to effect a sealing pressure against such infolded portions and a position wherein no material pressure is applied to the partially infolded end side walls of the carton blank, the movement between such pressure and non-pressure applied positions being facilitated by means of a multi-faceted geometry of the camming face of the cam.
Claims11
Apparatus for effecting the closure of an open end of a carton blank which includes a pressure sealing component, for partial partially infolded portions of the end side walls of the blank into at least partial overlying relationship to one another comprising,
- a cam having a rear face and a camming face, said camming face including a plurality of camming surfaces which vary in geometry, said camming surfaces including at least a convex radiussed camming surface which transitions into a concave radiussed camming surface, said transition occurring along an imaginary line drawn at an angle of 6 degrees from the vertical and wherein each of said radiussed surfaces is tangent to said imaginary line and to each other,
- means mounting said cam with said rear face thereof disposed adjacent to and facing in the direction of said infolded portions of the end side walls of the carton blank for linear movement relative to the partially infolded portions of the end side walls of the carton blank whereby linear movement of said rear face of said cam results in the application of a sealing pressure applied to said partial infolded portions of the end side walls of the carton blank.
Apparatus for effecting the closure of an open end of a carton blank which includes a pressure sealing component, for partially infolded portions of the end side walls of the blank into at least partial overlying relationship to one another comprising:
- a cam mounted for reciprocative linear movement toward and away from the partially infolded end side wall portions, said cam having a camming surface,
- a support arm having distal and proximal ends, said proximal end being mounted for pivotal movement of said distal end of said arm along a path which is substantially perpendicular to the direction of linear reciprocation of said cam,
- a cam follower mounted on said distal end of said support arm and disposed in operative juxtaposition to said camming surface of said cam whereby pivotal movement of said support arm moves said cam follower along said camming surface of said cam and effects corresponding linear movement of said cam,
- a pressure pad mounted for linear movement with said cam and disposed in juxtaposition to the infolded end side wall portions of the carton blank whereby linear movement of said cam in the direction of said infolded portions of the carton blank urges said pressure pad into pressure-sealing relationship to the infolded side end side wall portions of the carton blank.
Dependencies are inferred from the claim text.