Fastener with guide posts and methods therefor

1. A fastener, comprising:

a male closure element comprising:

a base member;

one or more male interlocking members extending distally from a first side of the base member; and

a plurality of guide posts extending distally from a second side of the base member;

the plurality of guide posts defining boundaries of a sealing region to which a heat seal bar can thermally adhere a plastic web by passing between the plurality of guide posts, the sealing region defined by a planar portion of the base member that spans between inner surfaces the plurality of guide posts.

2. The fastener of claim 1 , the plurality of guide posts comprising two guide posts.

3. The fastener of claim 2 , a first guide post defining a first center line oriented substantially orthogonally with a width of the base member, a second guide post defining a second center line oriented substantially orthogonally with the width of the base member, the one or more male interlocking members being disposed along the base member between the first center line and the second center line.

4. The fastener of claim 1 , each guide post terminating in a surface convex relative to a width of the base member.

5. The fastener of claim 1 , a distance from a first outer surface of a first male interlocking member to a second outer surface of a second male interlocking member being less than another distance between a first guide post inner surface and a second guide post inner surface.

6. The fastener of claim 1 , each guide post extending distally from the second side between 0.001 and 0.003 inches.

7. The fastener of claim 1 , a distance between a first guide post inner surface and a second guide post inner surface being between 0.086 inches and 0.123 inches.

8. The fastener of claim 1 , each male interlocking member terminating at asymmetrical barbs.

9. The fastener of claim 8 , the asymmetrical barbs comprising a product side barb and a consumer side barb, the product side barb being longer than the consumer side barb.

10. The fastener of claim 1 , the plurality of guide posts defining a guide channel for the heat seal bar.

11. The fastener of claim 1 :

an area disposed along the second side of the base member between two guide posts defining the sealing region to thermally adhere to the plastic web;

each male interlocking member defining a center line;

the center line passing substantially orthogonally through the sealing region.

12. The fastener of claim 1 , further comprising the plastic web thermally sealed to the fastener.

13. The fastener of claim 1 , further comprising a second fastener attached to the fastener by one or more female interlocking members.

14. The fastener of claim 13 further comprising a second plastic web thermally sealed to the second fastener.

15. A fastener, comprising:

a female closure element comprising:

a base member;

one or more female interlocking members extending distally from a first side of the base member; and

a plurality of guide posts extending distally from a second side of the base member;

the plurality of guide posts defining boundaries of a sealing region to which a heat seal bar can thermally adhere a plastic web by passing between the plurality of guide posts, the sealing region defined by a planar portion of the base member that spans between inner surfaces the plurality of guide posts.

16. The fastener of claim 15 , each female interlocking member having a U-shape and defining a member center line at a base of the U-shape, center lines of at least two female interlocking members disposed between post center lines of any two guide posts.