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Heavy-duty box opener

  • US 5,697,157 A
  • Filed: 09/13/1996
  • Issued: 12/16/1997
  • Est. Priority Date: 09/13/1996
  • Status: Expired due to Term
First Claim
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1. In a slitter, the combination comprisinga) a blade having a cutting edge;

  • b) a holder for the blade, including a handle, and a terminal on the handle retaining the blade with the blade edge protruding,c) and a shield carried by the holder proximate said terminal, for movement between extended position in which the blade is protected, and retracted position in which the blade edge is exposed for cutting,d) the shield having two side plates movable adjacent opposite sides of said terminal, protective structure extending between said plates to extend beyond said blade in shield extended position, and a retainer interconnecting said plates, there being a pivot interconnection between said plates and said holder, proximate said retainer,e) the holder including an insert plate carried by said terminal, the blade carried adjacent the insert plate with the blade edge projecting in skewed relation to lower corners of the side plates interconnected by said retainer, in shield retracted position,f) said shield side plates having lower edges that extend below the blade cutting edge in shield extended position,g) said terminal having flat, opposite sides in sliding engagement with said side plates, said shield defining edges adapted for stabilizing engagement with a surface to be slit,h) and wherein said terminal defines a flat, shallow first recess, the insert plate received in the first recess, the blade having a first portion received in said recess and a second portion protruding edgewise from that recess, with said cutting edge skewed relative to a lower edge defined by the insert plate, said terminal also defining a shallow second recess receiving a portion of the blade, there being retention rivet means extending through the recesses, the blade, the insert plate and said terminal.

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