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Publication numberUS2797477 A
Publication typeGrant
Publication dateJul 2, 1957
Filing dateMar 29, 1956
Priority dateMar 29, 1956
Publication numberUS 2797477 A, US 2797477A, US-A-2797477, US2797477 A, US2797477A
InventorsErdman Albert R
Original AssigneeErdman Albert R
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Box and package slitting and opening tool
US 2797477 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

July 2, 1957 A. R. ERDMAN 2,797,477


United States Patent ()E .7 7.411 BOX AND PACKAGE SLI'ILTING AND OPENING Albert R. Erdman, Washington, Kans.

Application March 29, 1956, Serial No. 574,748

1 Claim. (Cl. 30-2) The present invention relates to a hand implement or tool which is characterized by a handle having a specially constructed head wherein said head is, in turn, constructed to accommodate either single or double edged safety razor blades whereby to thus provide a blade-equipped implement for slitting and otherwise opening cardboard boxes, packages and the like.

Box and package openers which use either new or discarded razor blades are, obviously, not new. As a matter of fact, the art to which the invention relates is fairly well developed and this means that there are numerous instruments and implements which are intended to be similarly used. It may be added, in this connection, that it is customary to provide handle means with a receiver and to fit the blade in the receiver so that an edge portion projects and so that it may be caused to penetrate and rip around marginal edges of top, bottom and side walls of boxes and the like so that the wall may be removed from the box thus opened. A similarly constructed and performing package opener is disclosed in the H. Disbrow patent, No. 2,247,290. This is mentioned because in applicants construction in addition to holding the blade a corner portion thereof is projectible and retractible to a variable degree to bring about, it is believed, a more satisfactory penetrating and slitting action.

An obvious object in the instant matter is to structurally, functionally and otherwise improve upon the Disbrow patent and any other similar patented or marketed implements using insertible and removable razor blades. In carrying out the instant invention a construction is provided which, it is believed, will adequately fulfill the ordinary manufacturing requirements and economies of manufacturers and will aptly serve the miscellaneous uses of those who are given to the use of bladed implements of the class under consideration.

More explicitly, novelty is predicated in the instant disclosure on a substantially solid cast head which may, of course, be of lightweight aluminum or equivalent metal or, as may often be the situation, commercial plastics of a suitable grade. The head is bifurcated and the furcations and space therebetween provide a receiving pocket which is at the desired oblique angle in respect to the lengthwise dimension of the handle and which serves as a firm and reliable receiver and holder for the projectible and retractible razor blade.

Novelty is also predicated on the construction stated wherein the edge or lip portions of the furcations are fashioned into outstanding laterally disposed flanges, the cooperating surfaces of the flanges serving as guides or guide shoes and being at approximate obtuse angles in respect to each other.

Other objects, features and advantages will become more readily apparent from the following description and the accompanying sheet of illustrative drawings.

In the drawings, wherein like numerals are employed to designate like parts throughout the views:

Figure 1 is a perspective view of a tool or implement 2,797,477 Patented July 2,v 1957 constructed in accordance with the principles ofthe invention and showing the same in readiness foruse;

Figure 2 is a view showing a cardboard carton, box or the like and illustrating one manner in which the tool is employed, the portions of the tool seen being in section and elevation;

Figure 3 is a fragmentary view which serves to bring out the angularity and construction and position of the cavity or pocket in which the blade is inserted and held;

Figure 4 is a view in end elevation illustrating how the tool may be employed to slice through an edge portion of a vertical side wall or panel of a box to loosen the same from the top of the box; and

Figure 5 is a similar view showing another position or use wherein the guide is resting on top of the box so that the protruding knife may be caused to travel through what may be the junction corner between a side wall and top of the box or other package.

Referring now to the drawings the head is denoted generally by the numeral 6 and the handle is denoted at 8. The handle is joined at one end 10 to a rounded marginal edge portion 12 of the head. In general side elevation the head appears to be partly circular; or, it may be said to be somewhat segmental in shape. In any event, the opposed faces 14 are preferably flat and the marginal edge portion is rounded. As before stated the head is bifurcated as at 16 in Fig. 1 and defines a pair of opposed furcations 18 and 20 and what is more important defines an oblique angled blade receiving and holding pocket 22. One end of the pocket provides a solid abutment wall 24 for one transverse end of the insertible and removable safety razor blade 26 and one lengthwise Wall of the pocket provides a second abutment 28 with which the usual solid back portion of the blade is in constant contact so that the position of the blade is stabilized and the blade is prevented from pivoting and getting into a dangerous angular position while being used. One furcation or side wall as shown in Fig. 2 in particular is formed with a boss 30 which is in turn provided with a screw threaded hole to accommodate a setscrew 32 the shank of which extends into the pocket and engages the blade and binds it securely in place in said pocket, said screw having a suitable finger-grip 34. The furcation 20 is provided with a right angularly disposed guide flange 36 the flat surface 38 of which provides a guide shoe. A similar flange 40 is provided on the other jaw or furcation and this is denoted at 41 and it has a flat face 42 which is preferably corrugated or otherwise milled to provide antislipping elements. The blade is inserted and adjusted in the obvious manner shown in the drawings. It is also used in several different ways as illustrated in Figs. 2, 4 and 5.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

A box slitting tool comprising a head having a handle, said head being bifurcated, the furcations being solid and providing a rectangular blade receiving and retaining pocket between the furcations, said pocket being wholly closed at one end and substantially open at its opposite end, one end of the handle being rigidly connected to a margin of the head adjacent to the closed end of said pocket, said pocket being disposed at an oblique angle, in relation to the long axis of said handle, one of the furcations being provided with an outstanding right angularly disposed flange having a flat surface providing a guide shoe, and the other furcation being provided with an oblique angled outstanding flange disposed at an obtuse angle to said first flange and having a flat corrugated surface providing an anti-slipping guide shoe, and a setscrew carried by one of the furcations and having its shank projecting into said pocket in a manner to hold the blade 5 in the pocket.

References Cited in the file of this patent UNITED STATES PATENTS Arthur June 21, 1938 Lurie Aug. 23, 1938 Unsinger July 15, 1941 Vinton Dec. 2, 1941 Bates May 12, 1942

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2120960 *Jul 2, 1936Jun 21, 1938Arthur James FCutting device
US2128151 *Jun 22, 1937Aug 23, 1938Lurie August JCarton opener
US2249195 *Apr 12, 1939Jul 15, 1941Unsinger Philip HCarton opener
US2264960 *Jan 16, 1940Dec 2, 1941Stallo VintonInstrument for opening paper boxes and cartons
US2282697 *Sep 8, 1941May 12, 1942Alfred BatesSafety carton opener
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5412871 *Aug 17, 1994May 9, 1995Reyburn; Thomas P.Safety stock carton knife
US5899372 *Oct 1, 1997May 4, 1999Rodriguez; OscarMethod for opening a tab on a cardboard box
US6182364Sep 1, 1998Feb 6, 2001Thomas P. ReyburnSafety stock carton knife tip assembly and method of making
US6484404 *Oct 16, 2001Nov 26, 2002Liang-Shen KaoMulti-functional exacting knife structure
US8429825Mar 8, 2011Apr 30, 2013Sonoco Development, Inc.Cutting apparatus
US9737999 *Dec 16, 2013Aug 22, 2017Gb Ii CorporationFolding knife with tobacco can opener
US20030019337 *Jul 25, 2001Jan 30, 2003S Twenty One International, IncCutting device and method of use
US20140165509 *Dec 16, 2013Jun 19, 2014Gb Ii Corporation Dba Columbia River Knife & Tool CompanyFolding knife with tobacco can opener
WO1997038935A1 *Apr 11, 1997Oct 23, 1997Oscar RodriguezPackage tab opener
U.S. Classification30/2
International ClassificationB26B27/00
Cooperative ClassificationB26B27/005
European ClassificationB26B27/00B