Method of making slip resistant file folders

1. A method of making a slip-resistant folder to have a designated slip resistant region, said folder having a front flap having a first top edge, a rear flap connected to said front flap by a folder bottom, said rear flap having a second top edge, and a slip-resistant portion disposed on at least one of said flaps near said first or second top edge, said method comprising the steps of:

(a) providing folder material stock comprising stretchable polymeric material in the region to be embossed;

(b) providing embossing dies in spaced, operable, mating relationship;

(c) positioning said folder material stock appropriately in said embossing dies only in the designated slip resistant region;

(d) applying force to at least one of said embossing dies so as to decrease the spaced relationship; and

(e) deforming said folder material stock in the designated slip resistant region thereby stretching the stock and polymeric materials simultaneously without rupturing of either material.

2. The method of claim 1 , wherein said embossing dies comprise a rotary embosser.

3. The method of claim 2 , wherein said rotary embosser is a segmented rotary embosser.

4. The method of claim 1 , wherein said folder material stock comprises polymer coated paper.

5. The method of claim 1 , wherein said folder material stock comprises polymer fibers.

6. A method of making a slip-resistant portion on a hanging folder, said hanging folder having a front flap having a first top edge, a rear flap connected to said front flap by a folder bottom, said rear flap having a second top edge, and a slip-resistant portion disposed on at least one of said flaps near said first or second top edge, said method comprising the steps of:

(a) providing a web of folder material stock on a roll, said folder material stock comprising polymeric material;

(b) providing embossing dies in spaced, operable, mating relationship;

(c) providing rod members;

(d) providing a cutting blade;

(e) feeding said web of folder material stock from said roll into said embossing dies;

(f) applying force to at least one of said embossing dies so as to decrease the spaced relationship;

(g) deforming said folder material stock in a predetermined region to increase slip resistance in that region;

(h) cutting through said web of folder material stock with said cutting blade to form a discrete folder blank having opposing terminal edges;

(i) placing one of said rod member along each of said opposing terminal edges;

(j) folding said terminal edges to form channels for said rod members; and

(k) folding said discrete folder blank along a medial line to form a hanging folder.

7. The method of claim 6 , further comprising the step of making slots near each of said opposing terminal edges.

8. The method of claim 6 , wherein said folder material stock comprises polymer coated paper.

9. The method of claim 6 , wherein said folder material stock comprises a laminate of paper and a foil film.

10. A method of making a slip-resistant folder, said folder having a front flap having a first top edge, a rear flap connected to said front flap by a folder bottom, said rear flap having a second top edge, and a slip-resistant portion disposed on at least one of said flaps near said first or second top edge, said method comprising the steps of:

(a) providing a paper folder material stock

(b) integrating polymer fibers into the paper material stock in a predefined band across the stock, said band defining a gripping area

(c) providing embossing dies in spaced, operable, mating relationship;

(d) positioning said folder material stock appropriately in said embossing dies;

(e) applying force to at least one of said embossing dies so as to decrease the spaced relationship; and

(f) deforming said folder material stock in the gripping area thereby stretching the stock and integrated polymeric materials simultaneously without rupturing of either material.