REINFORCED MEDIA CUTTING DEVICE

• US 20070245571A1
• Filed: 12/28/2006
• Published: 10/25/2007
• Est. Priority Date: 04/21/2006
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Pearson, Scott D.
• Application Number:
  US11/616,996
• Publication Number:
  US 20070245571A1
• Time in Patent Office: Days
• US Class Current: 30/294
• CPC Class Codes: B26B 29/02 Guards or sheaths for knives
• CPC Class Codes: B26B 3/08 specially adapted for cutting cardboard, or wall, floor, or like covering materials
• CPC Class Codes: B26B 5/00 Hand knives with one or more detachable blades
• CPC Class Codes: B26B 5/005 specially adapted for cutting cardboard, or wall, floor or like covering materials
• CPC Class Codes: B26B 9/00 Blades for hand knives

Abstract

An elongated device for cutting media is provided. The device has a centerline axis along its length dividing it into first and second halves. The device includes (a) a handle having front and rear ends; (b) a head extending from the front end of the handle; and (c) a blade disposed in the head and having a cutting edge where a leading edge of the cutting edge intersects the top surface of a guide at a first reference point. The device further includes a guide, where the exit of the guide is asymmetric.

Claims

1. An elongated device for cutting media, the device having a centerline axis along its length dividing it into first and second halves, the device comprising:

a handle having front and rear ends;

a head extending from the front end of the handle, the head comprising (i) a cover having a sidewall extending therefrom and (ii) a guide disposed substantially underneath the cover and having opposing top and bottom surfaces, the top surface being proximate to the cover, the bottom surface being substantially planar, the guide further having first and second halves divided along the centerline axis, a first exit disposed on the first half of the guide and a second exit disposed on the second half of the guide; and

a blade disposed in the head and having a cutting edge where a leading edge of the cutting edge intersects the top surface of the guide at a first reference point,

wherein a first line connecting the first reference point to the first exit on the first half of the guide is not parallel with the bottom surface of the guide.

2. The device of claim 1, wherein a second line connecting the first reference point to the second exit on the second half of the guide is not parallel with the bottom surface of the guide.

3. The device of claim 1, wherein at least one of the sidewalls of the cover includes an outer surface that is substantially straight.

4. The device of claim 1, wherein the guide further includes two sidewalls, one on each half of the guide and at least one of the sidewalls of the guide includes an outer surface that is substantially straight.

5. The device of claim 1, wherein the distance from the first reference point to the guide first or second exit is less than about two inches.

6. The device of claim 1 further comprising a first deflector disposed on an inside surface of the first half of the cover and adjacent to the blade.

7. The device of claim 6, wherein the first deflector is in the form of a first rail that begins on the inside surface of the first half of the cover adjacent to the blade and extends to the exit of the head.

8. The device of claim 1 further comprising a second deflector disposed in the second half of the guide proximate to and past the leading edge of the blade and away from a forward end of the guide.

9. The device of claim 8, wherein the second deflector is in the form of a second rail begins proximate to the blade past its leading edge and extends to the second exit of the guide.

10. The device of claim 1, wherein the first half of the guide, the top surface of the guide has a downward slope starting from about the leading edge of the blade to the guide first exit, the downward slope being referenced with respect to the bottom surface of the guide.

11. The device of claim 1, wherein in the second half of the guide, the top surface of the guide has a upward slope starting from about the leading edge of the blade to the guide second exit, the upward slope being referenced with respect to the bottom surface of the guide.

12. The device of claim 11, wherein an angle theta is formed by an intersection of two lines, L₁ and R₂, wherein the line L₁ connects the guide second exit to the first reference point, the line R₂ is a line that lies in the plane of the bottom surface of the guide, the line being translated to the first reference point, and the angle theta is greater than about 5°

and less than about 20°

.

13. The device of claim 1 further comprising a puncture tool disposed at the rear end of the handle.

14. The device of claim 1 formed from an injection-molded polymer.

15. The device of claim 14, wherein the injection molded polymer is selected from the group consisting of polyolefins and acrylonitrile-butadiene-styrene copolymer.

16. The device of claim 14, wherein the handle is formed of two different polymers wherein a first polymer has a different property from a second polymer, the property selected from a group consisting of durometer, color, and combinations thereof.

17. The device of claim 1, wherein a first diameter D₁, measured from the guide first exit normal to the guide bottom surface, is less than a second distance D₂, measured from the guide second exit normal to the guide bottom surface.

18. The device of claim 1, wherein a first distance, δ

₁ is measured from a blade longitudinal centerline to a first internal wall of the guide and a second distance, δ

₂, is measured from the blade longitudinal centerline to a second internal wall of the guide and wherein δ

₁ and δ

₂ can take on the following permutations;

δ

₁ is less than δ

₂, δ

₁ is equal to δ

₂, and δ

₁ and δ

₂ are substantially zero.

19. The device of claim 1, wherein a portion of the blade is embedded in at least one of the guide and the cover.

20. The device of claim 1, wherein the blade is replaceable.