US 2003/0217628 A1Published application

Rotary plunge slitter with clam style slotted anvil

AssigneeMarquip, Inc.

InventorWayne A. Michalski

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Abstract

An apparatus for slitting a running paperboard web includes a thin high speed rotary slitting blade that is plunged through the moving web and into a slot between a pair of anvil surfaces supporting the web on the opposite side. Because the slitting blade and the anvil surfaces are vertically separated and pre-positioned before order change, an adjustment apparatus is provided to spread the anvil surfaces apart to provide an open gap with a large target for blade edge when it is plunged through the web and into the slot. The anvil surfaces are then closed to bring the edges of the surfaces against the opposite faces of the blade for running operation. Preferably, the anvil surfaces are mounted on brackets hinged together below the surfaces to move the edges of the surfaces defining the slot between the opened and closed positions in the manner of a clam shell. The anvil surface support assembly is also adjustable in the machine direction to compensate for reduction in rotary slitting blade diameter with blade wear.

Claims10

Dependent claims

In an apparatus for slitting a running paperboard web, said apparatus including an annular rotary cutting blade positioned with its axis of rotation over the web and having a peripheral cutting edge defined by opposite blade faces extending downwardly through the path of the web to slit the web in the direction of web travel, and a support assembly under the web including a pair of surfaces positioned to support the web at the point of the slit, said surfaces defining therebetween a slot for receiving the blade edge therein, the improvement comprising:

means for supporting said surfaces to permit the slot to be opened to receive the blade edge and closed to cause portions of the surfaces defining the slot to bear against the opposite blade faces;
a first actuator interconnecting the surfaces and operable to open and close said slot;
an upper support for said cutting blade including a blade drive and a blade support head mounted for movement between an upper inoperative position with the blade out of engagement with the web and the surfaces and a lower operative position with the blade in slitting engagement with the web and with the blade edge extending into the slot;
and,
a second actuator interconnecting the support structure and the blade support head operable to move the blade support head between the upper and lower positions.

2 more elements

In an apparatus for slitting a running paperboard web, said apparatus including a thin annular rotary cutting blade positioned with its axis of rotation over the web and having a peripheral cutting edge defined by opposite blade faces extending downwardly through the path of the web to slit the web in the direction of web travel, and an anvil assembly under the web including a pair of anvil plates positioned to support the web at the point of the slit, said plates defining therebetween a slot for receiving the blade edge therein, the improvement comprising:

a lower support arrangement for said anvil plates including a mounting bracket for each plate, a pivot joint joining the brackets for hinged movement to permit the slot to be opened to receive the blade edge and closed to cause the anvil plates to bear against the opposite blade faces;
a first actuator interconnecting the brackets, spaced from the pivot joint and operable to open and close said slot;
an upper support structure for said cutting blade including a blade drive and a blade support head mounted for generally vertical movement between an upper inoperative position with the blade out of engagement with the web and the anvil plates and a lower operative position with the blade in slitting engagement with the web and with the blade edge extending into the slot;
and,
a second actuator interconnecting the support structure and the blade support head operable to move the blade support head between the upper and lower positions.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/260,979Filed 30 Sep 2002
Priority: 21 May 2002
Published: 27 Nov 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

B26D 7/20
Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting: cutting beds
B26D 2007/202
Cutting beds: rollers or cylinders being pivoted during operation
Y10T 83/6584
With means to convey work relative to tool station: cut made parallel to direction of and during work movement
Y10T 83/773
With means to support work relative to tool[s]: work-support includes passageway for tool [e.g., slotted table]

Family

Application10/152,501Continuation in part · filed 21 May 2002
Application10/260,979Continuation in part · filed 30 Sep 2002
US 2004/0149105 A1Published application
US 6,826,993 B2Related patent
US 6,837,135 B2Related patent
US 2003/0217628 A1This patent

From the US filing history. Foreign family members aren’t listed.