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Publication numberUS2178790 A
Publication typeGrant
Publication dateNov 7, 1939
Filing dateMay 7, 1938
Priority dateMay 7, 1938
Publication numberUS 2178790 A, US 2178790A, US-A-2178790, US2178790 A, US2178790A
InventorsHenry Abner E
Original AssigneeHenry Abner E
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Cutting implement
US 2178790 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Nov. 7, 1939. E HENRY 2,178.79!)

CUTTING Filed Mag 7, 1938 Patented Nov 7, i939 UNl'lEE SllAliE is "rear attics CUTTING IMPLEMENT I Abner E. Henry, Greensburg, Pa.

Application May 7, 1938, Serial No. 206,656

1 Claim.

This invention relates to a cutting implement and has relation more particularly to a device of this kind of a push or punch type and which is particularly adapted for use in the opening of household cartons such as usedin connection with the sale Of various foodstufifs as for example breakfast foods and the like.

The invention has for an object to provide a knife of this kind constructed in a manner to permit its use in connection with cartons of varying sizes and which may be employed to cut a corner or end a carton or, if desired, to remove an entire end portion.

It is also an object of the invention to provide, a device of this kind which can be readily grasped by a hand and conveniently operated after the fa iion of a plane.

An additional object of the invention is to provide a. device of this kind including a substantially V-shaped cutt" edge together with an elongated arm extending beyond the outermost portion of the cutting edge and spaced therefrom, said arm providing means to facilitate the operation of the knife and also to "ovide the desired leverage to facilitate the cutting action.

A further object of the invention is to provide a knife of this kind with a forwardly disposed elongated arm which serves as a guide to determine the type of out.

The invention consis s in the details of construction and in the combination and arrangement of the several parts of my improved cutting implemenwhereby certain important advantages are'attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawing, wherein:

Figure l is a view in top plan of knife constructed in accordance with an embodiment of my invention;

Figure'z is a sec nal view taken longitudinal- 1y through the knife as illustrated Figure 1 showing the same as initially eng ed with a carton, thecarton being fragmentarily indicated in section;

Figure 3 is a bottom plan view of the device as herein disclosed;

Figure 4 is a transverse sectional view taken substantially on the line 4-5 of Figure 2;

Figure 5 is a view in perspective of the knife as herein embodied. I As herein disclosed, my improved knife comprises a body B of suitable material and Which is of a hollow structure open at opposite ends and i being reduced in width from its rear end toward its front end. This reduction in width is to permit onedevice to be nested within another to facilitate shipment and also'to allow a ready and effective gripping oi the body B by the hand.

The body 13, as herein disclosed, comprises a substantially flat back wall l and a forward bottom wall '22 disposed on a downward curvature from end to end. This wall 2 is spaced from. but in relatively close proximity to'theback Wall 2 and preferably extends a slight distance in advance thereof. This wall 2 is relatively short and has its end portions formed with the downwardly and inwardly curved marginal flanges i5 defining the side or longitudinal edges of the back plate 2.

and challenges 3 are employed insteadof having the bottom plate 2 substantially co-extensive in length with the back plate l in order to lighten the tool with, of course, resultant saving in material. It is to be noted that the back plate I and the bottom plate 2 result in thebody B being of a hollow or tubular structure openat both ends.

These flanges c serve to give desired rigidity and strength to the tool as a. whole The bottom plate 2 is preferably of a width at I least equal to the largest sizes of cartons used for household distribution of foodstuffs and kin-- dred materials so that a single device may be with cartons of various sizes.

The forward marginal portion of the bottom plate 2 is of a V-shaped formation with the apex forwardly disposed and positioned at substantially the transverse center of the back plate 1; This forward marginal portion of the bottom wall 2 also projects forwardly a material distance of the forward edge or margin proper of the plate I;

This V-shaped extension of the bottom plate L has its marginal portions formed into the knife or cutting edges 3. As disclosed in the accompanying drawing, the cutting edges 3 are formed. on the material constituting the bottom plate 2.

. employed with equal advantage in connection.

The forward end of the back plate I at its transverse center is continued by an elongated and forwardly directed guide arm 4 of a length to terminate at a point considerably in advance of 5 the apex of the forward end of the bottom plate 2. The outer end portion of this arm 4 is formed to provide a cup-like portion or pocket 5 to receive the tip portion of the forefinger of the hand grasping the body B when the knife is in use. By this means the knife may be effectively maintained steady during a cutting operation. It is also to be noted that this outer end portion of the arm 4 provides a rounded portion to allow rolling contact upon a wall of the carton C during a cutting operation whereby such cutting operation is materially facilitated. The rear portion of the arm 4 has disposed therealong a reinforcing or strengthening rib 6 preferably pressed therefrom.

In Figure 2 is illustrated my improved knife in an initial position in cutting open a carton C. The closer to the horizontal the arm 4 is positioned when initially contacted with the end wall 1 of the carton C the greater the distance from said wall 1 the cutting edge 3' will penetrate a side wall 8 of the carton and vice versa.

The device as a Whole is adapted to be pushed toward the wall to be cut to effect the desired penetration and in accordance with the extent of penetration of the knife will depend the width of the out. If desired, the knife may be pushed entirely across the carton to effect an entire removal of an end portion of the carton.

By having the body of a hollow or tubular structure no hindrance or obstruction will be offered by contact of any portion of the device with the carton unless, of course, the carton should be of an abnormal width or of a width greater than the width of the forward end of the device.

It is believed to be obvious that when desired the device can be employed with convenience in cutting off a corner portion or punching a wall of a carton as desired to best provide an opening for the removal of the contents of the carton.

It is also to be emphasized that the efficiency of the implement is materially increased by having the forward portion of the bottom plate 2 disposed on an upward curvature as is particularly illustrated in Figure 2 of the drawing. As a result of this curvature, when the implement is in place for the raising of the implement with the outer end of the arm 4 serving as a fulcrum, a corner portion or end portion of a container can be effectively removed.

From the foregoing description it is thought to be obvious that a cutting implement constructed in accordance with my invention is particularly well adapted for use by reason of the convenience and facility with which it may be assembled and'operated, and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in 'practice except as hereinafter claimed.

, I claim:

A cutting implement for opening cartons comprising a tubular body structure open at its opposite ends and having a cross sectional configuration providing a substantially flat back wall and a bottom wall disposed on a downward curvature, the bottom wall having a V-shaped cutting edge extending in advance of the back wall, the apex of said cutting edge being outwardly disposed and at substantially the transverse center of the back wall, said back wall at substantially its transverse center being provided with a forwardly directed arm terminating beyond the apex of the cutting edge of the bottom wall for contact with a wall of the carton to be opened whereby said arm serves as a lever guide.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4205440 *Nov 28, 1978Jun 3, 1980Morgan Jerry APackage opener arrangement
US4467524 *Jan 24, 1983Aug 28, 1984Stanley RuffCorrugated carton cutter
US6027514 *Dec 17, 1997Feb 22, 2000Fox Hollow Technologies, Inc.Apparatus and method for removing occluding material from body lumens
US6299622Aug 19, 1999Oct 9, 2001Fox Hollow Technologies, Inc.Atherectomy catheter with aligned imager
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US6623496Aug 14, 2001Sep 23, 2003Fox Hollow Technologies, Inc.Atherectomy catheter with aligned imager
US6638233Aug 19, 1999Oct 28, 2003Fox Hollow Technologies, Inc.Apparatus and methods for material capture and removal
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US8328829Nov 2, 2007Dec 11, 2012Covidien LpHigh capacity debulking catheter with razor edge cutting window
US8414604Oct 13, 2009Apr 9, 2013Covidien LpDevices and methods for manipulating a catheter shaft
US8469979Sep 22, 2011Jun 25, 2013Covidien LpHigh capacity debulking catheter with distal driven cutting wheel
US8496677Dec 2, 2010Jul 30, 2013Covidien LpMethods and devices for cutting tissue
US8574249May 1, 2012Nov 5, 2013Covidien LpEasily cleaned atherectomy catheters and methods of use
US8597315Jul 1, 2010Dec 3, 2013Covidien LpAtherectomy catheter with first and second imaging devices
US8784333Jan 21, 2009Jul 22, 2014Covidien LpApparatus and methods for material capture and removal
US8784440Dec 1, 2008Jul 22, 2014Covidien LpMethods and devices for cutting tissue
US8808186Nov 10, 2011Aug 19, 2014Covidien LpFlexible debulking catheters with imaging and methods of use and manufacture
U.S. Classification30/2, 30/280
International ClassificationB26B27/00
Cooperative ClassificationB26B27/00
European ClassificationB26B27/00