Backpack frame system

A semi-rigid plastic adjuster sheet for use with a backpack including a frame assembly, a shoulder strap assembly having shoulder straps and a yoke, and a hook and loop fastener having a hook member and a loop member, one of said hook member and loop member being affixed to the frame assembly and the other of said hook member and loop member being affixed to the yoke of the shoulder strap assembly, whereby the shoulder strap assembly is selectively movable longitudinally relative to the frame assembly, said adjuster sheet comprising:

• top and bottom ends;
• a generally horizontally-oriented reinforcing rib proximate said top end for providing ending rigidity about an upper portion of said adjustment sheet;
• a generally vertically-oriented reinforcing rib for providing bending rigidity about a vertical plane while allowing torsional flex about a vertical axis;
• and
• wherein said adjuster sheet is configured to be selectively insertable between said hook member and said loop member in order to effect separation thereof to permit said shoulder strap assembly to move longitudinally relative to said frame assembly, wherein said bottom end is free of reinforcing ribs such that said adjuster sheet may be inserted between said hook member and said loop member to interrupt a connection therebetween.

A semi-rigid plastic adjuster sheet for use with a backpack including a frame assembly, a shoulder strap assembly having shoulder straps and a yoke, and a hook and loop fastener having a hook member and a loop member, one of said hook member and loop member being affixed to the frame assembly and the other of said hook member and loop member being affixed to the yoke of the shoulder strap assembly, whereby the shoulder strap assembly is selectively movable longitudinally relative to the frame assembly, said adjuster sheet comprising:

• top and bottom ends;
• a generally horizontally-oriented reinforcing member proximate said top end for providing ending rigidity about an upper portion of said adjustment sheet;
• a generally vertically-oriented reinforcing member for providing bending rigidity about a vertical plane while allowing torsional flex about a vertical axis;
• and
• wherein said adjuster sheet is configured to be selectively insertable between said hook member and said loop member in order to effect separation thereof to permit said shoulder strap assembly to move longitudinally relative to said frame assembly;
• wherein said bottom end of said adjuster sheet is free of said reinforcing members such that said adjuster sheet may be inserted between said hook member and said loop member to interrupt a connection therebetween.