Rotary cutting die for cutting corrugated board including a die board and an attached substrate for supporting product ejectors
AssigneeContainer Graphics Corporation
InventorJames M. Smithwick, JR.
Life of this patent
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Abstract
A rotary cutting die including a curved die board having a series of product ejector openings formed completely through the die board. Secured to an inner surface of the die board is a substrate. A series of product ejectors are secured to the substrate and project therefrom through the product ejector openings and past an outer surface of the die board. These product ejectors function to engage a portion of a die cut product passing through the nip and exert a force on the die cut product which assists in separating the die cut product from the rotary cutting die.
Claims24
A rotary cutting die adapted to be mounted on a rotary die cylinder for cutting corrugated board fed into a nip disposed between the die cylinder and a rotating anvil to produce a die cut product, the rotary cutting die comprising:
- a curved die board configured to be mounted to the cylinder and including inner and outer surfaces;
- one or more product cutting blades mounted in the die board for cutting the corrugated board fed through the nip to produce the die cut product;
- a product ejector opening formed in the die board and extending from the outer surface to the inner surface of the die board;
- a substrate secured to the inner surface of the die board and extending over the product ejector opening;
- and
- a product ejector constructed of compressible material and secured to the substrate and extending outwardly from the substrate and through the product ejector opening and past the outer surface of the die board for engaging a portion of the die cut product passing through the nip and exerting a force on the die cut product which assists in separating the die cut product from the cutting die.
A rotary cutting die adapted to be mounted to a rotary die cylinder for cutting corrugated board fed into a nip disposed between the die cylinder and a rotating anvil to produce a die cut product, the rotary cutting die comprising:
- a curved die board configured to be mounted to the cylinder and including inner and outer surfaces;
- one or more product cutting blades mounted in the die board for cutting the corrugated board fed through the nip to produce the die cut product;
- one or more product ejector openings formed completely through the die board and extending from the inner surface to the outer surface of the die board;
- a flexible tape secured to the inner surface of the die board and extending over the product ejector opening;
- and
- a product ejector constructed of compressible material and secured to the flexible tape and extending outwardly therefrom through the product ejector opening and past the outer surface of the die board for engaging a portion of the die cut product passing through the nip and exerting a force on the die cut product which assists in separating the die cut product from the cutting die.
A method of constructing a rotary cutting die that cuts corrugated board into die cut products comprising:
- forming a series of product ejector openings through a curved die board wherein the product ejector openings extend completely through the curved die board and extend from an outer surface of the die board to an inner surface of the die board;
- securing one or more substrates to the inner surface of the die board such that the one or more substrates extend over the product ejector openings in the die board;
- mounting one or more product cutting blades in the die board for cutting the corrugated board into the die cut products;
- and
- securing a series of product ejectors to the one or more substrates and projecting the product ejectors from the one or more substrates through the product ejector openings in the die board and past the outer surface of the die board such that the product ejectors extend outwardly from the outer surface of the die board.
Dependencies are inferred from the claim text.