Rotary die cutting machine having integral scrap stripper
First Claim
1. In a rotary die cutting machine of the type having a rotatably mounted cylindrical die cutting roll including die means affixed to the outer surface of said roll, said die means including a plurality of circumferentially and longitudinally extending upstanding rule-like dies defining a pattern for cutting a sheet into a product portion and a scrap portion, the improvement in combination therewith comprising means associated with said die cutting roll for stripping the scrap portion from the product portion, said stripping means including:
- a plurality of pin-like impaling members projecting outwardly from said roll, said pin-like members being positioned on said roll so as to pierce and hold said scrap portions to said roll, such that the product portion separates from the scrap portion as said roll rotates;
means for ejecting said product portion from said roll;
means for separating said scrap portion from said roll as said roll rotates, said separating means comprising a blade-like scrapping knife having an edge resting substantially against the outer surface of said roll, said knife edge being positioned to peel said scrap portion from said roll as said roll rotates; and
means for preventing contact between said separating means and said dies.
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Accused Products
Abstract
A rotary die cutting machine having an integral scrap stripper for separating the scrap portion from the product portion of the cut sheet. The rotary die cutting machine includes a rotatably mounted cylindrical die cutting roll including a number of circumferentially and longitudinally extending upstanding rule-like dies affixed to the outer surface of the roll and defining a pattern for cutting a sheet into a product portion and a scrap portion. The scrap stripper includes a plurality of pin-like impaling members projecting outwardly from the roll, the pin-like members being positioned on the roll so as to pierce and hold the scrap portions to the roll such that the product portion separates from the scrap portion as the roll rotates. One or more blade-like scrapping knifes having an edge resting substantially against the outer surface of the roll operate to peel the scrap portion from the roll as the roll rotates, causing the product portion and the scrap portion to assume separate paths of travel from the rotary die cutting machine. In order to prevent contact between the scrapping knives and the longitudinally extending rule-like dies, gaps or interruptions are provided in the dies by means of a cutting wheel to permit the passage of the scrapping knives therethrough.
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Citations
10 Claims
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1. In a rotary die cutting machine of the type having a rotatably mounted cylindrical die cutting roll including die means affixed to the outer surface of said roll, said die means including a plurality of circumferentially and longitudinally extending upstanding rule-like dies defining a pattern for cutting a sheet into a product portion and a scrap portion, the improvement in combination therewith comprising means associated with said die cutting roll for stripping the scrap portion from the product portion, said stripping means including:
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a plurality of pin-like impaling members projecting outwardly from said roll, said pin-like members being positioned on said roll so as to pierce and hold said scrap portions to said roll, such that the product portion separates from the scrap portion as said roll rotates; means for ejecting said product portion from said roll; means for separating said scrap portion from said roll as said roll rotates, said separating means comprising a blade-like scrapping knife having an edge resting substantially against the outer surface of said roll, said knife edge being positioned to peel said scrap portion from said roll as said roll rotates; and means for preventing contact between said separating means and said dies. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a rotary die cutting machine of the type having a rotatably mounted cylindrical die cutting roll including die means affixed to the outer surface of said roll, said die means including a plurality of circumferentially and longitudinally extending upstanding rule-like dies defining a pattern for cutting a sheet into a product portion and a scrap portion, the method of fabricating means for stripping the scrap portion from the product portion, said method including the steps of:
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providing means associated with said roll for ejecting said product portion from said roll; providing means for holding said scrap portion to said roll to separate said scrap portion from said product portion; providing means for separating said scrap portion from said roll, said separating means including a blade-like scrapping knife having an edge resting substantially against the outer surface of said roll, said knife edge being positioned to peel said scrap portion from said roll as said roll rotates; and providing a narrow gap in one or more of said dies of sufficient width to just permit passage of said scrapping knife therethrough as said roll rotates. - View Dependent Claims (9, 10)
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Specification