Vacuum bag with reinforcement patch

In a vacuum bag for a vacuum cleaner having a dirt-laden air outlet, said vacuum bag comprising:

• (A) an air-permeable outer bag formed of paper;
• (B) an air-permeable inner bag formed of meltblown thermoplastic polymeric material disposed within said outer bag;
• and
• (C) an air-impermeable collar disposed on an outer surface of said outer bag;
• said inner bag, said outer bag and said collar defining therethrough a channel of given area for passage therethrough of a dirt-laden air outlet into said inner bag;
• the improvement wherein said vacuum bag additionally includes:
• (D) an air-impermeable reinforcement patch formed of flashspun polyolefin material disposed intermediate said inner and outer bags opposite and at least partially below said channel when said vacuum bag is in use;
• said patch having a thickness of about 127-279 microns, an Elmendorf tear strength of 3.5 N (both MD and CD), and a work to break of 4.4 Nm (MD) and 5.2 Nm (CD);
• said patch being adhered to an inner surface of said outer bag, and the surface area of said patch being less than 20% of that of said outer bag but greater than that of said channel;
• thereby to protect a portion of said outer bag generally opposite the outlet from penetration and tearing by particles entrained in the dirt-laden air expelled at high speed from the outlet.

In a vacuum bag for a vacuum cleaner having a dirt-laden air outlet, said vacuum bag comprising:

• (A) an air-permeable bag;
• and
• (B) an air-impermeable collar disposed on an outer surface of said bag;
• said bag and said collar defining therethrough a channel of given area for passage therethrough of a dirt-laden air outlet into said bag;
• the improvement wherein said vacuum bag additionally includes
• (C) an air-impermeable reinforcement patch formed of flashspun polyolefin material disposed opposite and at least partially below said channel when said vacuum bag is in use;
• thereby to protect a portion of said bag generally opposite the outlet from penetration and tearing by particles entrained in the dirt-laden air expelled at high speed from the outlet.

In a vacuum bag for a vacuum cleaner having a dirt-laden air outlet, said vacuum bag comprising:

• (A) an air-permeable bag;
• and
• (B) an air-impermeable collar disposed on an outer surface of said bag;
• said bag and said collar defining therethrough a channel of given area for passage therethrough of a dirt-laden air outlet into said bag;
• the improvement wherein said vacuum bag additionally includes
• (C) an air-impermeable reinforcement patch formed of flashspun polyolefin material disposed opposite and at least partially below said channel when said vacuum bag is in use;
• said patch having a thickness of about 127-279 microns, an Elmendorf tear strength of 3.5 N (both MD and CD), and a work to break of 4.4 Nm (MD) and 5.2 Nm (CD);
• said patch being adhered to an inner surface of said bag, and the surface area of said patch being less than 20% of that of said bag but greater than that of said channel;
• thereby to protect a portion of said bag generally opposite the outlet from penetration and tearing by particles entrained in the dirt-laden air expelled at high speed from the outlet.