Patent US4048719A successfully refreshed from Google Patents.
US4048719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carton opener
Assignee: Individual
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Filing: 1976-02-17
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Granted: 1977-09-20
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Expires: 1996-02-17
Abstract
Abstract A hand-held cutting device is provided for opening cartons, such as cardboard boxes, without damaging the contents within the carton. The cutting device comprises a handle having an elongated flat bottom surface which is adapted to slide along the outer surface of the carton during a cutting operation. A cutting blade is secured to the handle and extends outwardly through an opening in the bottom surface of the handle for engaging and cutting the carton. A guard is secured to the cutting blade across its outwardly extending end and includes a portion extending forwardly of the cutting edge of the cutting blade. This forward portion of the guard is curved towards the handle and serves to deflect the contents of the carton away from the cutting blade during a cutting operation. Preferably the upper front edge of the guard forms a second cutting edge so that the guard easily pierces the carton during the initiation of a cutting operation.
Inventors
- 👤 Mary Kay Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:56
CPC Classifications
B; B65; B65B; B65B69/00; B65B69/0033; B26; B26B; B26B27/00; B26B27/005; B26B29/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
A hand-held device for opening cartons comprising: a handle having a lower flat surface, a cutting blade secured to said handle and extending outwardly and downwardly from said flat surface, said cutting blade having a forwardly facing cutting edge and a lower, outwardly extending edge, wherein said cutting edge is adapted to cut a carton as said handle is moved in a forward direction, a guard secured across the lower, outwardly extending edge of said cutting blade and substantially perpendicular thereto, said guard including a portion extending forwardly of said cutting edge and forming a slot between said lower flat surface of said handle and said forwardly extending portion of said guard, a pair of facing and vertically elongated plate portions, said plate portions being secured at their lower ends to said guard and adapted to lockingly receive the cutting blade therebetween, said plate portions being slidably received through a longitudinal slot formed in the bottom surface of said handle, and means for simultaneously vertically adjustably locking said cutting blade and said plate portions to said handle and for varying the width of said slot.
Claim 2
Dependent Claim
185 words
A hand-held device for opening cartons comprising: a handle having a lower flat surface, a cutting blade secured to said handle and extending outwardly and downwardly from said flat surface, said cutting blade having a forwardly facing cutting edge and a lower, outwardly extending edge, wherein said cutting edge is adapted to cut a carton as said handle is moved in a forward direction, a guard secured across the lower, outwardly extending edge of said cutting blade and substantially perpendicular thereto, said guard including a portion extending forwardly of said cutting edge and forming a slot between said lower flat surface of said handle and said forwardly extending portion of said guard, a pair of facing and vertically elongated plate portions, said plate portions being secured at their lower ends to said guard and adapted to lockingly receive the cutting blade therebetween, said plate portions being slidably received through a longitudinal slot formed in the bottom surface of said handle, and means for simultaneously vertically adjustably locking said cutting blade and said plate portions to said handle and for varying the width of said slot.
Claim 3
Dependent Claim
22 words
The device as defined in claim 1, and in which said forwardly extending portion of said guard includes a lower curvilinear surface.
Claim 4
Dependent Claim
71 words
The invention as defined in claim 1, wherein said cutting blade and said plate portions include registering apertures which in turn register with a vertically elongated slot formed in said handle and wherein said means for locking comprises a bolt member extending through said cutting blade and said plate portion apertures and also through said vertically elongated slot in said handle and a nut adapted to threadably engage said bolt member.
Claim 5
Dependent Claim
34 words
The invention as defined in claim 3 and including a support member secured to said handle and having a vertically elongated slot in registration with and adjacent the vertically elongated slot in the handle.
Claim 6
Dependent Claim
25 words
The invention as defined in claim 1 and including a cutting edge formed laterally across the front end of the forward portion of the guard.
Claim 7
Dependent Claim
16 words
The invention as defined in claim 1, wherein said plate portions are integral with said guard.
References Cited (Backward Citations)
US1288522A
Cited
US2566493A
Cited
US3153853A
Cited
US3380159A
Cited
US3543400A
Cited
US3831274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |