Canvas reinforcement structure

• US 5,512,347 A
• Filed: 01/11/1994
• Issued: 04/30/1996
• Est. Priority Date: 01/11/1994
• Status: Expired due to Fees

• Current Assignee: Liu Chu
• Original Assignee: Liu Chu
• Inventors: Chu, Liu
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Choi, Kathleen L.
• Application Number:
  US08/179,688
• Time in Patent Office: 840 Days
• Field of Search: 428/45, 428/81, 428/120, 428/121, 428/124, 428/131, 428/137, 428/126, 428/130, 428/99, 135/119, 248/500
• US Class Current: 428/81
• CPC Class Codes: A44B 13/0082 by riveting
• CPC Class Codes: E04H 15/64 Tent or canopy cover fastenings
• CPC Class Codes: Y10T 428/161 with frame, casing, or perimeter structure
• CPC Class Codes: Y10T 428/24008 including fastener for attaching to external surface
• CPC Class Codes: Y10T 428/24182 Inward from edge of web or sheet
• CPC Class Codes: Y10T 428/2419 Fold at edge
• CPC Class Codes: Y10T 428/24215 Acute or reverse fold of exterior component
• CPC Class Codes: Y10T 428/24231 At opposed marginal edges
• CPC Class Codes: Y10T 428/24264 Particular fold structure [e.g., beveled, etc.]
• CPC Class Codes: Y10T 428/24273 including aperture
• CPC Class Codes: Y10T 428/24322 Composite web or sheet

Abstract

The present invention relates to a canvas reinforcement structure which enables canvas to become strong enough to sustain greater external force (such as wind), and enlarge tension strength to avoid breakage as well as form overall restraint effect for obtaining whole covering performance; it comprises reinforcement corner block mounted on respective corners of canvas, and corner block including upper and lower reinforcement pieces to form contact limited room and outlet hole for retaining canvas and therefore rivetting together with canvas by means of rivet; central position having through hole, collar rope hole for building up each corner of canvas with resistant ability against tearing force without risk of breakage; and restraint portion is folded with appropriate width of canvas for inserting restraint rope and auxiliary rope wrapping body so as to strengthen resistance of canvas periphery against lifting over as well as reinforcing the effect of secure tying. The improved canvas for corner strength and covering in position compared with conventional canvas, may achieve endurable effect against breakage and excellent covering performance thereof.

Claims

1. An improved reinforced canvas having at least one corner comprising

a reinforcement corner block comprised of a one piece integral gusset having a hollow body mounted on the corner of said canvas,

said body having

spaced apart upper and lower reinforcement pieces and end pieces connecting said upper and lower pieces,

said upper, lower and end pieces defining an internal contact limited room for receiving the corner of said canvas,

an outlet hole through which the tip of the canvas corner can extend,

and further including a through hole

and a rivet hole, said through hole and said rivet hole extending through said upper and lower reinforcement pieces;

said canvas having a restraint portion with fixed holes therethrough and an auxiliary rivet extending through said fixed holes;

at least one rivet in said rivet hole of said reinforcement corner block for rivetting said canvas corner together with said reinforcement corner block canvas; and

a main rivet rivetted into said through hole, said main rivet and said at least one rivet to increase overall strength of said canvas corner.

2. The improvement for canvas reinforcement according to claim 1, wherein said restraint portion contains a restraint rope which increases the covering strength together with the aid of restraint portion thickness;

and

a restraint rope, and an auxiliary rope wrapping body that is provided for tying a pull rope when needed to help strengthen the covering performance of said canvas.

3. An improved reinforced canvas as claimed in claim 1 and wherein said canvas has a main portion and an edge portion comprised of an edge piece of said canvas folded over and attached to said main portion, thereby defining a bore along the periphery of said edge portion, and

a restraint rope in said bore.

4. An improved reinforced canvas as claimed in claim 3 wherein said main rivet has a rope wrapping body and said restraint rope is attached to said rope wrapping body.

5. A canvas having a reinforced corner with a tip, said canvas comprising

a main portion and an edge portion, said edge portion including said corner and comprised of an edge piece of said canvas folded over and attached to said main portion, thereby defining a bore along the periphery of said edge portion,

a reinforcement corner gusset block comprised of

a one piece integral hollow body having spaced apart upper and lower reinforcement pieces and end pieces connecting said upper and lower pieces, said upper, lower and end pieces defining an enclosed internal opening for receiving the corner of said canvas, an outlet hole through which said tip of the canvas corner extends, a through hole, and a rivet hole;

a rivet in said rivet hole for rivetting said canvas corner together with said gusset block;

a main rivet having a rope wrapping body rivetted into said through hole; and

a restraint rope attached to said rope wrapping body and extending in said bore.