US2743523A - Carton opening knife - Google Patents

Carton opening knife Download PDF

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Publication number
US2743523A
US2743523A US51814455A US2743523A US 2743523 A US2743523 A US 2743523A US 51814455 A US51814455 A US 51814455A US 2743523 A US2743523 A US 2743523A
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Prior art keywords
blade
portion
knife
means
handle component
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Inventor
Honey Robert
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Honey Robert
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B27/00Hand cutting tools not provided for in the preceding groups, e.g. finger rings for cutting string, devices for cutting by means of wires
    • B26B27/005Carton openers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B29/00Guards or sheaths or guides for hand cutting tools; Arrangements for guiding hand cutting tools
    • B26B29/02Guards or sheaths for knives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26BHAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B5/00Hand knives with one or more detachable blades
    • B26B5/006Hand knives with one or more detachable blades specially adapted for using razor blades as blades

Description

y 1956 R. HONEY 2,743,523

CARTON OPENING KNIFE Filed June 27, 1955 0 INV EN TOR. 1% ff 50 59- gy J6 8 J9 20 Jd J3 J7 J0 CARTON OPENING KNIFE Robert Honey, Los Angeles, Calif.

Application June 27, 1955, Serial No. 518,144

4 Claims. (Cl. 311-286) This invention relates to knives of the type used for opening paper cartons and like operations and more particularly to an improved form thereof characterized by automatic shielding of the cutting blade.

An object of the invention is to provide a knife structure for opening cartons and similar operations in which the cutting edge of the blade is constantly resiliently shielded by means which are displaced as an incident to use of the knife.

Another object of the invention is to provide a knife construction for opening cartons or like operations in which the cutting means comprises a razor blade replaceably mounted in a handle means.

Still another object vof the invention is to provide a knife for opening cartons and like operations comprising a handle means for replaceablysupporting a razor blade and a spring clip for retaining the blade mounted on the handle means and for serving as a resilient guard means to shield the edge of the blade except when the knife is being used.

With the above objects in view, together with such additional objects and advantages as may subsequently appear, the invention resides in the parts, and in the construction, combination and arrangement of parts described, by way of example, in the following specification of a presently preferred mode of execution of the invention; reference being had to the accompanying drawings which form a part of said specification and in which drawings:

Fig. 1 is a side elevation of a knife embodying the invention,

Fig. 2 is a top plan view of the knife shown in Fig. l; a portion being shown in section taken on the line 22 of Fig. 1,

Fig. 3 is a fragmentary side elevation showing the blade carrying portion of the knife as in use.

Fig. 4 is an end elevation taken at the left hand end of Fig. 1,

Figs. 5 and 6 are sectional views taken respectively, on the lines 55 and 6-6 of Fig. 1, and

Fig. 7 is an exploded View of the blade carrying end of the handle component and the parts associated therewith.

Referring to the drawings, the illustrated embodiment of the invention comprises a handle component 1 of elongated flattened configuration; the hand grip portion 2 thereof having a central web portion 3. For convenience, the various parts of the invention will be referred to as top, bottom, upper, lower, and the like with reference to Fig. l and without regard for any position the knife may occupy in use. The handle component is preferably formed of a plastic molding and in conformity with good molding design, the sections are made as thin as possible consistent with the required strength. The blade carrying portion of the handle component is generally indicated at 4 and includes a blade engaging face 5 disposed substantially in the medial plane of the handle component and extends upwardly from the lower edge of the handle and terminates at a horizontally extending recess 6 of suflicient size and depth to accommodate one side of the back member 7 of lnited States Patent 0.

'ice

a safety razor blade 8; the width of the face 5 being slightly greater than the width of the blade and the lower corner of the portion 4 being cut away on a wide curve as at 9 to expose a corner of the blade 3. Additionally, the face 5 is provided with outwardly projecting lugs 10, 10 at each end thereof adapted to engage the notches 11, 11 of the blade as well as corresponding notches 12, 12 formed in the ends of a blade retaining member 13 which overlies the opposite side of the blade 8 and which is provided with an elongated clearance groove 14 extending along its upper edge to afford clearance for the opposite side of the blade back member 7. Preferably, this retaining member is also formed as a plastic molding. The lower outer corner of the blade retaining member 13 is curved as at 15 to correspond with the curved end 9 of the handle component, and the member is of a thickness to bring the outer face thereof flush with the outer face of the handle component. Thus, it will be noted that when the blade is disposed between the handle component and the blade retaining member, it is supported over its entire face except for the corner portion which is exposed by the curved end faces 9'and 15.

The retainer member 13 is removably secured to the handleportion by a resilient metal clip 16 comprising a piece of sheet metal having upwardly extending spring arms 17, 17 at one end thereof which engage recesses 18 and 19 formed in the outer side faces of the handle component and retainer member, respectively; said arms ad jacent their upper ends being formed to provide slightly inwardly curved detent portions which engage complementarily formed surfaces in the recesses 18 and 19 (see Fig. 5). The clip member extends in a run 20 from the arms 17 toward the end of the blade carrying portion and is provided With a longitudinal slot 21 in alignment with the blade 8 and thence extends upwardly in a vertical run 22 to a second pair of spring arms 23, 23 which slightly frictionally engage recesses 24 and 25 formed in the upper outer corners of the member 13 and blade carrying portion 4; said recesses being open at their upper ends to permit sliding action of the arms 23, 23 therein as will be presently explained.

In Figs. 1 and 3 it will be noted that the run 22 of the clip member 26 extends beyond the curved ends 15 and 9 and thence extends upwardly in the plane of the distal end of the handle component in a curve which is of much lesser radius than the curved end faces 9 and 15. Thus when the clip is in repose as in Fig. 1, the exposed edge of the blade 8 is within the confines of the clip element. When the knife is in use (see Fig. 3), pressure on the outer portion of the run 22 will cause the clip to bend with resultant exposure of the corner of the blade edge through the slot 21. Thus, in cutting open a carton, pressure on the side of the carton will project the corner of the blade into cutting engagement with the carton; the sliding engagement of the arms 23, 23 with their respective recesses serving to permit the necessary bending of the run 21) of the clip (see Fig. 3). When pressure on the carton or other surface ceases, the clip will return to its blade guarding position. When a blade edge becomes broken or dull, the clip is readily removed and the blade turned end for end to permit the other end to be used or to be replaced by a new blade as required. it is to be noted that the novel design comprised only three parts other than the blade and that these parts need not be assembled until the device is first supplied with a blade. Still further, the automatic guarding of the blade makes the device safe to handle when not in use and in the event of the knife slipping while being used, the blade is instantly guarded as soonas pressure thereon ceases. A further advantage lies in the fact that the depth of cut is limited and that there is consequently no danger of damaging the contents of a carton being cut open.

While the foregoing specification discloses a presently preferred form of the invention, it is not to be inferred that the invention is limited to the specific form so disclosed, and it will be understood that the invention embraces all such changes and modifications in the parts and in the construction, combination and arrangement of parts as shall come within the purview of the appended claims.

i claim:

l. A means for holding a backed razor blade with resultant formation of a knife means; said holding means comprising a handle component including a hand grip portion and a blade holding portion formed as a longitudinal extension of the hand grip portion and having on one side thereof a bearing face for one side of a hacked razor blade and a socket in which the back component at said one side of the razor blade is received, a holding member overlying the blade engaging portion of said iandle component and including a bearing face engaging the opposite side of a razor blade positioned on said handle component with the back component thereof disposed in said socket; said holding member having a clearance cut therein for reception or" the opposite side of the razor lade back component, interenga ging means on said handle component and said holding means eflective to maintain them in aligned position; said blade engaging faces of said handle component and said holding means being similarly cut away to expose the end portion of the cutting edge of the razor blade, and spring clip means detachably securing said holding means and said handle component clampingly engaging a razor blade therebetween; said clip means including a resilient, slotted guard element normally guarding the exposed edge of a razor blade clamped between said handle component and said holding means.

2. A carton opening knife means employing a replaceably mounted razor blade comprising a handle component including a hand grip portion and a blade engaging portion formed as a longitudinal extension of said hand grip portion, a holding means detachably mounted on said blade engaging portion and eifecive to clamp a razor blade against said blade engaging portion of said handle means; said blade engaging portion of said handle component and said holding means having complementary portions cut away to expose an end portion of the razor blade edge, and a resilient guard element detachably carried by said handle component and said holding means normally extending beyond the exposed blade edge; said guard having a slot therein through which the blade is projected upon said guard being pressed against the side of a carton with resultant displacement of said guard from its normal position.

3. A knife means as claimed in claim 2 in which said guard includes spring clip means serving simultaneously to position said guard and to hold said handle component and said holding means clampingly engaging a razor blade therebetween.

4. A knife means as claimed in claim 2 in which said guard comprises a spring metal strip including a first portion extending longitudinally parallel to the edge of the razor blade thence extending in a second portion parallel to the end of the razor blade said guard at the end of said first portion remote from said second portion having opposed spring fingers engaging sockets formed in the outer faces of said handle component and said holding means and further having opposed spring fingers at the end of said second portion remote from said first portion slidingly engaging the outer faces of said handle component and said holding means. i

No references cited.

US2743523A 1955-06-27 1955-06-27 Carton opening knife Expired - Lifetime US2743523A (en)

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Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387366A (en) * 1967-03-28 1968-06-11 Agway Inc Film slitter
US3451132A (en) * 1967-05-26 1969-06-24 Roy H Mulkins Offset blade carpet and linoleum knife
US3590483A (en) * 1968-06-24 1971-07-06 Harry Szczepanski Shielded knife
US3999290A (en) * 1976-03-15 1976-12-28 Wood Jess W Safety knife
US4077124A (en) * 1976-11-29 1978-03-07 Norbert Christmann Paper hanging trimming tool
US4086698A (en) * 1977-02-28 1978-05-02 Macfield Texturing, Inc. Safety guard for the blade of carton openers
US4106196A (en) * 1977-05-05 1978-08-15 Pacific Handy Cutter, Inc. Coin wrapper cutting device
US4262418A (en) * 1979-08-20 1981-04-21 Roberts Consolidated Industries, Inc. Boot for trimmer for resilient floor covering material
US4503612A (en) * 1983-08-08 1985-03-12 Davis Raymond E Safety guard equipped cardboard box cutter
WO1985001431A1 (en) * 1983-10-05 1985-04-11 Jensen Ronald P Scalpel with a fixed depth of cut
US4531286A (en) * 1983-02-08 1985-07-30 Vito Raymond P Carton cutting knife
US4569133A (en) * 1983-01-06 1986-02-11 Sharpoint, Inc. Depth limited cutter
US4587735A (en) * 1985-01-18 1986-05-13 Walters Charles J Knife guard
US4631829A (en) * 1985-09-03 1986-12-30 Pacific Handy Cutter, Inc. Hand-held safety holder for a single-edge razor blade for cutting a sheet or strand
US4757611A (en) * 1987-02-02 1988-07-19 Tommi Dean J Coin roll cutter
US4899443A (en) * 1987-10-31 1990-02-13 Martor-Argentax E.H. Beermann Kg Safety knife for cardboard and like materials
US5075974A (en) * 1990-07-24 1991-12-31 Mcilhatten Edward T Cutter for fibrous compressible material
US5241750A (en) * 1992-04-30 1993-09-07 Chomiak Bryant D Utility razor safety knife
US5522135A (en) * 1994-09-06 1996-06-04 Spellbound Development Group Box opener
US5697157A (en) * 1996-09-13 1997-12-16 Spellbound Development Group Heavy-duty box opener
WO1999007526A1 (en) * 1997-08-08 1999-02-18 The Stanley Works Utility knife with retractable blade guard
US5890290A (en) * 1997-08-05 1999-04-06 Davis; Raymond E. Adjustable depth safety cutter
US5943780A (en) * 1997-04-28 1999-08-31 Mcilhatten; Edward T. Cutter for fibrous compressible material
EP0963820A1 (en) 1998-06-11 1999-12-15 MARTOR-ARGENTAX E.H. Beermann KG Knife
US6070326A (en) * 1999-06-11 2000-06-06 Martor-Argentax E.H. Beermann Kg Razor knife with retractable blade guard
WO2000064645A1 (en) * 1999-04-27 2000-11-02 Mci Worldcom, Inc. Apparatus and method for perforating package coverings
US6178640B1 (en) 1999-08-09 2001-01-30 Spellbound Development Group, Inc. Slitter device
US6233832B1 (en) 1998-06-11 2001-05-22 Martor-Argentax E.H. Beermann Kg Razor knife with retractable and latchable blade guard
US6418624B1 (en) * 2000-09-29 2002-07-16 Harrison Huang Artist's knife having an automatically retractable blade
US6487948B1 (en) * 1999-10-18 2002-12-03 Elias A. Alfi Food scoring knife and method for scoring
US6560873B1 (en) 1999-11-12 2003-05-13 Mel Wayne Ortner Automatic safety knife
US6578266B2 (en) 2000-12-07 2003-06-17 Bryant D. Chomiak Safety utility razor knife
US6615495B1 (en) * 1999-04-27 2003-09-09 Worldcom, Inc. Apparatus and method for perforating package coverings
US20050086812A1 (en) * 2003-10-28 2005-04-28 Votolato Earl J. Utility knife with dual retractable cutting guides
US20050217114A1 (en) * 2004-04-05 2005-10-06 Earl Votolato Disposable blade cartridge utility knife
US7024772B1 (en) * 2001-11-21 2006-04-11 Specmaster Inc. Case knife with multiple position blade guards
US20090056145A1 (en) * 2007-03-21 2009-03-05 Alfi Elias A Double-bladed knife
US20110106123A1 (en) * 2008-02-05 2011-05-05 Lafauci Michael Two-part surgical device
US8099868B1 (en) 2004-04-05 2012-01-24 Votolato Living Trust Disposable blade cartridge utility knife
US20130061475A1 (en) * 2011-09-08 2013-03-14 Joseph L. Lutgen Ergonomic Cutter
US9107695B2 (en) 2012-03-19 2015-08-18 Brolex Llc Surgical instruments and methods of use
US20150282831A1 (en) * 2014-04-07 2015-10-08 Jerry Jesseph MD Device and method for improved surgical incisions
US20160229074A1 (en) * 2013-09-05 2016-08-11 Martor Kg Knife

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387366A (en) * 1967-03-28 1968-06-11 Agway Inc Film slitter
US3451132A (en) * 1967-05-26 1969-06-24 Roy H Mulkins Offset blade carpet and linoleum knife
US3590483A (en) * 1968-06-24 1971-07-06 Harry Szczepanski Shielded knife
US3999290A (en) * 1976-03-15 1976-12-28 Wood Jess W Safety knife
US4077124A (en) * 1976-11-29 1978-03-07 Norbert Christmann Paper hanging trimming tool
US4086698A (en) * 1977-02-28 1978-05-02 Macfield Texturing, Inc. Safety guard for the blade of carton openers
US4106196A (en) * 1977-05-05 1978-08-15 Pacific Handy Cutter, Inc. Coin wrapper cutting device
US4262418A (en) * 1979-08-20 1981-04-21 Roberts Consolidated Industries, Inc. Boot for trimmer for resilient floor covering material
US4569133A (en) * 1983-01-06 1986-02-11 Sharpoint, Inc. Depth limited cutter
US4531286A (en) * 1983-02-08 1985-07-30 Vito Raymond P Carton cutting knife
US4503612A (en) * 1983-08-08 1985-03-12 Davis Raymond E Safety guard equipped cardboard box cutter
WO1985001431A1 (en) * 1983-10-05 1985-04-11 Jensen Ronald P Scalpel with a fixed depth of cut
US4587735A (en) * 1985-01-18 1986-05-13 Walters Charles J Knife guard
US4631829A (en) * 1985-09-03 1986-12-30 Pacific Handy Cutter, Inc. Hand-held safety holder for a single-edge razor blade for cutting a sheet or strand
US4757611A (en) * 1987-02-02 1988-07-19 Tommi Dean J Coin roll cutter
US4899443A (en) * 1987-10-31 1990-02-13 Martor-Argentax E.H. Beermann Kg Safety knife for cardboard and like materials
US5075974A (en) * 1990-07-24 1991-12-31 Mcilhatten Edward T Cutter for fibrous compressible material
US5241750A (en) * 1992-04-30 1993-09-07 Chomiak Bryant D Utility razor safety knife
US5522135A (en) * 1994-09-06 1996-06-04 Spellbound Development Group Box opener
US5697157A (en) * 1996-09-13 1997-12-16 Spellbound Development Group Heavy-duty box opener
US5943780A (en) * 1997-04-28 1999-08-31 Mcilhatten; Edward T. Cutter for fibrous compressible material
US5890290A (en) * 1997-08-05 1999-04-06 Davis; Raymond E. Adjustable depth safety cutter
WO1999007526A1 (en) * 1997-08-08 1999-02-18 The Stanley Works Utility knife with retractable blade guard
US5878501A (en) * 1997-08-08 1999-03-09 The Stanley Works Utility knife with retractable blade guard
US6233832B1 (en) 1998-06-11 2001-05-22 Martor-Argentax E.H. Beermann Kg Razor knife with retractable and latchable blade guard
EP0963820A1 (en) 1998-06-11 1999-12-15 MARTOR-ARGENTAX E.H. Beermann KG Knife
DE19923179C2 (en) * 1998-06-11 2000-05-11 Beermann Kg Martor Argentax knife
DE19923179A1 (en) * 1998-06-11 1999-12-23 Beermann Kg Martor Argentax Knife for opening bags
WO2000064645A1 (en) * 1999-04-27 2000-11-02 Mci Worldcom, Inc. Apparatus and method for perforating package coverings
US6615495B1 (en) * 1999-04-27 2003-09-09 Worldcom, Inc. Apparatus and method for perforating package coverings
US6070326A (en) * 1999-06-11 2000-06-06 Martor-Argentax E.H. Beermann Kg Razor knife with retractable blade guard
US6178640B1 (en) 1999-08-09 2001-01-30 Spellbound Development Group, Inc. Slitter device
US6487948B1 (en) * 1999-10-18 2002-12-03 Elias A. Alfi Food scoring knife and method for scoring
US6560873B1 (en) 1999-11-12 2003-05-13 Mel Wayne Ortner Automatic safety knife
US6718637B1 (en) 1999-11-12 2004-04-13 Mel Wayne Ortner Automatic safety knife
US6418624B1 (en) * 2000-09-29 2002-07-16 Harrison Huang Artist's knife having an automatically retractable blade
US6578266B2 (en) 2000-12-07 2003-06-17 Bryant D. Chomiak Safety utility razor knife
US7024772B1 (en) * 2001-11-21 2006-04-11 Specmaster Inc. Case knife with multiple position blade guards
US7082688B2 (en) * 2003-10-28 2006-08-01 Earl J. Votolato Utility knife with dual retractable cutting guides
US20050086812A1 (en) * 2003-10-28 2005-04-28 Votolato Earl J. Utility knife with dual retractable cutting guides
US20050217114A1 (en) * 2004-04-05 2005-10-06 Earl Votolato Disposable blade cartridge utility knife
US7475480B2 (en) 2004-04-05 2009-01-13 The Votolato Living Trust Disposable blade cartridge utility knife
US8099868B1 (en) 2004-04-05 2012-01-24 Votolato Living Trust Disposable blade cartridge utility knife
US20090056145A1 (en) * 2007-03-21 2009-03-05 Alfi Elias A Double-bladed knife
US20110106123A1 (en) * 2008-02-05 2011-05-05 Lafauci Michael Two-part surgical device
US20130061475A1 (en) * 2011-09-08 2013-03-14 Joseph L. Lutgen Ergonomic Cutter
US9107695B2 (en) 2012-03-19 2015-08-18 Brolex Llc Surgical instruments and methods of use
US20160229074A1 (en) * 2013-09-05 2016-08-11 Martor Kg Knife
US9681886B2 (en) * 2014-04-07 2017-06-20 Jerry Jesseph MD Device and method for improved surgical incisions
US20150282831A1 (en) * 2014-04-07 2015-10-08 Jerry Jesseph MD Device and method for improved surgical incisions

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