Cable tie

1. A cable tie, comprising:

an elongated tongue with two ends and two broad sides;

a tip at one end of the tongue;

a set of ratchet teeth extending along one broad side of the tongue;

a locking head at the other end of the tongue, the locking head having sides defining an opening for receiving the tip of the tongue, and a movable pawl that is hinged at one side of the opening, with another side of the opening defining an abutment wall that is across the opening from the pawl, and wherein the pawl engages with one or more of the ratchet teeth when the tongue has been inserted through the opening with the set of ratchet teeth facing the pawl;

wherein the abutment wall defines at least two protruding cross members, to strengthen the abutment wall.

2. The cable tie of claim 1 , wherein the at least two cross members are essentially perpendicular to one another.

3. The cable tie of claim 1 , wherein the at least two cross members are at least a pair of longitudinal cross members that extend in total along at least a substantial portion of the length of the abutment wall in the direction of insertion of the tip of the tongue in the opening in the locking head.

4. The cable tie of claim 3 , wherein at least a pair of the longitudinal cross members are colinear, extending along a common axis from opposite ends of the abutment wall, but not joining each other.

5. The cable tie of claim 4 , wherein the at least two cross members are at least two parallel pairs of longitudinal cross members, the longitudinal cross members of each pair extending along a common axis from opposite ends of the abutment wall, but not joining each other, wherein the two axes are parallel but not colinear.

6. The cable tie of claim 5 , wherein the cross members of each colinear pair of cross members are separated by an essentially perpendicular cross member.

7. The cable tie of claim 4 , wherein at least one colinear pair of cross members is separated by an essentially perpendicular cross member.

8. The cable tie of claim 1 , wherein at least one cross member is located on the portion of the abutment wall against which force is applied through the tongue by the portion of pawl that contacts the tongue when the tongue is forced against the surface of the abutment wall by the pawl.

9. The cable tie of claim 8 , wherein at least one cross member extends in a direction that is essentially perpendicular to the direction of insertion of the tip of the tongue in the opening in the locking head.

10. The cable tie of claim 9 , wherein a transverse cross member extends across essentially the entire extent of the surface of the abutment wall.

11. The cable tie of claim 1 , wherein at least one of the cross members is located on the inside of the abutment wall.

12. The cable tie of claim 1 , wherein at least one of the cross members is located on the outside of the abutment wall.

13. The cable tie of claim 1 , wherein the abutment wall has a nominal thickness, and at least one of the cross members has a nominal width that is substantially the same as the abutment wall nominal thickness.

14. The cable tie of claim 13 , wherein the at least two cross members are two parallel pairs of longitudinal cross members on the inside of the abutment wall and substantially equally spaced from one another and from the ends of the abutment wall, and an essentially perpendicular cross member separating the pairs and extending across essentially the entire width of the abutment wall, wherein each cross member has a nominal width that is substantially the same as the abutment wall nominal thickness.

15. The cable tie of claim 1 , wherein the at least two cross members are spaced such that they lay directly across the opening from the edges of the pawl.

16. A cable tie, comprising:

an elongated tongue with two ends and two broad sides;

a tip at one end of the tongue;

a set of ratchet teeth extending along one broad side of the tongue;

a locking head at the other end of the tongue, the locking head having sides defining an opening for receiving the tip of the tongue, and a movable pawl that is hinged at one side of the opening, with another side of the opening defining an abutment wall that is across the opening from the pawl, and wherein the pawl engages with one or more of the ratchet teeth when the tongue has been inserted through the opening with the set of ratchet teeth facing the pawl;

wherein the abutment wall defines at least a pair of protruding longitudinal cross members that extend in total along at least a substantial portion of the length of the abutment wall in the direction of insertion of the tip of the tongue in the opening in the locking head, and at least one essentially perpendicular cross member that intersects the longitudinal cross members, to strengthen the abutment wall.

17. The cable tie of claim 16 , wherein the abutment wall has a nominal thickness, and the cross members have a nominal width that is substantially the same as the abutment wall nominal thickness.

18. The cable tie of claim 16 , comprising two parallel pairs of longitudinal cross members on the inside of the abutment wall and substantially equally spaced from one another and from the ends of the abutment wall, and an essentially perpendicular cross member separating the pairs and extending across essentially the entire width of the abutment wall, wherein each cross member has a nominal width that is substantially the same as the abutment wall nominal thickness.

19. The cable tie of claim 16 , wherein the two pairs of longitudinal cross members are spaced such that they lay directly across the opening from the edges of the pawl.