Knife

• US 20060288587A1
• Filed: 05/16/2005
• Published: 12/28/2006
• Est. Priority Date: 05/20/2004
• Status: Active Grant

• Current Assignee: W A 1 Designs Limited
• Original Assignee: W A 1 Designs Limited
• Inventors: Ireland, William Alfred
• Granted Patent: US 7,958,639 B2
• Time in Patent Office: Days
• US Class Current: 30/294
• CPC Class Codes: B26B 27/005 Carton openers
• CPC Class Codes: B26B 3/00 Hand knives with fixed blades handles, attaching the handles B25G
• 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

Abstract

A knife comprises a knife body defining a channel across which extends at least part of the cutting edge of a blade, the channel having a base region located behind the cutting edge in the cutting direction, the knife body being provided, adjacent the base region, with flow passages on opposing sides thereof, the flow passages being out of alignment with one another.

Claims

1. A knife comprising a knife body defining a channel across which extends at least part of the cutting edge of a blade, the channel having a base region located behind the cutting edge in the cutting direction, the knife body being provided, adjacent the base region, with flow passages on opposing sides thereof, the flow passages being out of alignment with one another.

2. A knife according to claim 1, wherein the flow passages comprise ramped surfaces.

3. A knife according to claim 2, wherein the ramped surfaces are of relatively shallow angle, and thus are relatively long.

4. A knife according to claim 2, wherein the ramped surfaces are ramped both in the longitudinal direction thereof, and in a transverse direction, the ramping in the transverse direction being of a steeper angle.

5. A knife according to claim 1, wherein the knife body defines at least a second channel across which the cutting edge of the blade extends, the knife body being provided with flow passages located adjacent the second channel to deflect the cut edges of the material, in use, away from one another.

6. A knife according to claim 1, wherein the cutting edge of the blade extends at a shallow angle to the channel.