Carton construction and method of making a cutting edge therefor

• US 4,399,935 A
• Filed: 02/11/1981
• Issued: 08/23/1983
• Est. Priority Date: 02/11/1981
• Status: Expired due to Fees

• Current Assignee: Barbara L. Nelder
• Original Assignee: Barbara L. Nelder
• Inventors: Nelder, Barbara L.
• Primary Examiner(s): YOST, FRANK
• Application Number:
  US06/233,406
• Time in Patent Office: 923 Days
• Field of Search: 225/48, 225/49, 225/50, 225/91, 493/86, 493/148, 493/59, 493/61
• US Class Current: 225/49
• CPC Class Codes: B31B 50/742 Coating; Impregnating; Waterproofing; Decoating
• CPC Class Codes: B65D 2583/087 with cutting edges being impregnated or coated
• CPC Class Codes: B65D 83/0882 and for cutting interconnected articles cutting devices for dispensers intended for re-use B65H35/008
• CPC Class Codes: B65H 35/002 Hand-held or table apparatus B65H35/006 takes precedence
• CPC Class Codes: Y10T 225/249 Blade unitary with container
• CPC Class Codes: Y10T 225/298 Blades or severing devices

Abstract

A carton construction and method of making an integral cutting edge therefor. An intermittent cut-score line is utilized at the juncture of the front and bottom main panels the cut segments of which extend into the front panel to provide a plurality of discrete teeth for the cutting edge. The end portions of each cut segment terminate approximately at the juncture of the front and bottom panels so that the space between the cut segments provide an axis for folding between the front and bottom panels in erecting the carton. Additionally, the individual teeth are stiffened by applying a coating thereto. The carton blank is formed into an open ended tube and a plurality of these tubes, in flattened condition, are stacked with the cutting teeth uppermost in which position they are coated, such as by a roller coating.

Claims

1. A method of making a carton with an integral cutting edge located between the front and bottom panels of the carton which comprises the steps of

a. scoring a flat carton blank in a plurality of positions to provide a fold score line between adjacent longitudinally extending main panels of said blank except between the front and bottom panels,

b. forming a series of individual, closely-spaced teeth by cut-scoring partially through the front panel of said carton at the juncture of the front and bottom panels,

3. A method of making a carton with an integral cutting edge as defined in claim 1 including the additional step of stiffening the teeth to prolong the useful life of the cutting edge provided by said teeth when said carton is erected.

5. A method of making a carton with an integral cutting edge as defined in claim 3 including the additional step of using a roller to coat the upstanding cutting edges.

2. each tooth formed by a cut-score being generally V-shaped with the free terminal leg portions thereof located at the juncture of said front and bottom panels and forming a fold axis therebetween,

c. and, thereafter, folding the carton blank along the score lines and the fold axis between the front and bottom panels to erect the carton.

4. A method of making a carton with an integral cutting edge as defined in claim 2 including the additional steps of

a. forming said carton blank into an open ended tube by adhesively securing a glue flap to said front panel,

b. standing a plurality of said open ended tubes in flattened condition positioned closely adjacent each other and each with their integral cutting edges uppermost,

c. and coating the upstanding cutting edges.

6. In a paperboard carton construction of the type having front, back, top and bottom main panels and an adhesive flap pivotally secured to said top main panel and adhesively secured to said front main panel the improvement which comprises:

a. a cutting edge formed integrally with the carton blank and positioned at the juncture of the front and bottom panels, said cutting edge being formed from a series of individual, closely-spaced teeth each of which is formed from a cut-score that penetrates only partially through the blank, each of said teeth being generally V-shaped with the free terminal leg portions thereof lying along a fold axis established upon erecting the carton and located between said front and bottom main panels.