Trim edge stripper for a corrugated board rotary cutting die
First Claim
1. A rotary cutting die for cutting corrugated board and trimming an outside trim piece from the corrugated board so as to yield a product portion comprising:
- (a) a base adapted to be mounted to a rotary cylinder;
(b) at least one trim cutting blade secured to the base and extending outwardly therefrom for trimming an outside trim piece from a sheet of corrugated board; and
(c) at least one trim stripper mounted outside the trim cutting blade for engaging the trim piece and stripping the trim piece from the product portion, the trim stripper including an angled outer stripper surface that is angled outwardly and away from the trim blade in such a fashion that at least a portion of the angled outer stripper surface extends outwardly past the height of the trim blade.
1 Assignment
0 Petitions
Accused Products
Abstract
A rotary cutting die includes a trim stripper having a generally pentagonal shape which forcibly separates severed trim scrap from cut corrugated board, directing the scrap material generally downwardly and away from the trimmed corrugated board product. The pentagonal shaped stripping member mounts on the surface of a die board adjacent a trim cutting blade and is formed of a resilient material, such as closed cell rubber, which deforms elastically when forced into contact with the incoming blank of material. The angled nature of the stripper surface allows the stripper to smoothly contact and capture the leading edge of the blank, greatly reducing the potential for an initial destructive misalignment at the stripper-blank interface. More particularly, the angled upper surface of the pentagonal shaped member is oriented such that as the stripper is brought into contact with the blank and deformation of the resilient stripper occurs, the engaged angled surface tends to hold the blank material against an adjacent anvil cylinder. Simultaneous with this holding action of the stripper, the cutting blade engages and penetrates the blank material, effectively severing or trimming the edge of the blank and producing a segment of scrap. As the elastically deformed stripper begins to recoil, and return to it'"'"'s original pentagonal shape, the angled surface of the stripper remains in general contact with the severed scrap and continues to hold the scrap material firmly against the anvil surface. By doing such, the stripper effectively forces the severed scrap material to be expelled from the rotary die assembly along a tangent to the anvil cylinder that is angled or directed significantly lower than the path taken by the trimmed corrugated board product.
34 Citations
35 Claims
-
1. A rotary cutting die for cutting corrugated board and trimming an outside trim piece from the corrugated board so as to yield a product portion comprising:
-
(a) a base adapted to be mounted to a rotary cylinder;
(b) at least one trim cutting blade secured to the base and extending outwardly therefrom for trimming an outside trim piece from a sheet of corrugated board; and
(c) at least one trim stripper mounted outside the trim cutting blade for engaging the trim piece and stripping the trim piece from the product portion, the trim stripper including an angled outer stripper surface that is angled outwardly and away from the trim blade in such a fashion that at least a portion of the angled outer stripper surface extends outwardly past the height of the trim blade. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
-
23. A rotary cutting die for cutting corrugated board and trimming an outside trim piece from the cutting board so as to yield a product portion comprising:
-
(a) a base;
(b) at least one trim cutting blade secured to the base and extending outwardly therefrom for trimming an outside trim piece from a sheet of corrugated board; and
(c) at least one trim stripper secured to the base and disposed outside of the trim cutting blade for engaging and stripping the outside trim piece from corrugated board, the trim stripper including a body portion and a flexible deflector projecting outwardly from the body portion for engaging the cut trim piece and generally assisting in controlling the movement of the cut trim piece after it has been cut by the cutting die. - View Dependent Claims (24, 25, 26, 27)
-
-
28. A method of controlling and managing an outside trim piece cut from a sheet of corrugated board passing between a rotary cutting die and a rotating anvil comprising:
-
(a) directing the sheet of corrugated board between the rotary cutting die and the rotating anvil;
(b) engaging an outside trim edge portion of the sheet with an angled outer surface of a trim stripper carried by the cutting die and disposed outside a trim blade, said angled outer surface of the trim stripper is angled outwardly and away from the trim blade in such a fashion that at least a portion of the angled outer stripper surface extends outwardly past a height of the trim blade; and
(c) cutting the outside trim edge portion of the corrugated board sheet with the trim blade while compressing the trim stripper between the cutting die and the trim edge portion being cut as the corrugated board passes between the cutting die and the anvil; and
(d) releasing the trim stripper as the trim stripper and cut trim edge portion pass through a nip defined between the anvil and the cutting die causing the angled outer surface of the trim stripper to expand outwardly and engage the cut trim edge portion and strip the cut trim edge portion from the trim blade. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35)
-
Specification