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A system for use with a balloon having a balloon envelope is provided. The system includes a tendon assembly for mounting tendons to the balloon envelope. This tendon assembly includes a plate structure having a fill port attached to an apex of the balloon envelope and a plurality of tendons arrange

A system for use with a balloon having a balloon envelope is provided. The system includes a tendon assembly for mounting tendons to the balloon envelope. This tendon assembly includes a plate structure having a fill port attached to an apex of the balloon envelope and a plurality of tendons arranged over the plate structure. The fill port is configured to allow lift gas to pass into balloon envelope. Each tendon of the plurality of tendons has a first portion, a second portion, and a middle portion disposed between the first portion and the second portion. The first portion of a given tendon is arranged to engage a first section of the plate structure. The second portion is arranged to engage a second section of the plate structure opposite of the first section. The middle portion is arranged to wrap around the fill port of the plate.

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1. A system, comprising: a balloon having a balloon envelope; anda tendon assembly for mounting tendons to the balloon envelope, the tendon assembly comprising: a plate structure having a fill port attached to an apex of the balloon envelope, the fill port being configured to allow lift gas to pass

1. A system, comprising: a balloon having a balloon envelope; anda tendon assembly for mounting tendons to the balloon envelope, the tendon assembly comprising: a plate structure having a fill port attached to an apex of the balloon envelope, the fill port being configured to allow lift gas to pass into balloon envelope; anda plurality of tendons arranged over the plate structure, each tendon of the plurality of tendons having a first portion, a second portion, and a middle portion disposed between the first portion and the second portion, wherein the first portion of a given tendon is arranged to engage a first section of the plate structure and the second portion of the given tendon is arranged to engage a second section of the plate structure opposite of the first section and the middle portion is arranged to wrap around the fill port of the plate structure. 2. The system of claim 1, wherein the tendon includes webbing. 3. The system of claim 2, wherein the middle portion includes a split in the webbing to allow a portion of the fill port to pass through the webbing. 4. The system of claim 3, wherein the fill port is configured so that the middle portion of one or more given tendons from the plurality of tendons can be stacked up at the apex of the balloon envelope. 5. The system of claim 1, wherein the first and second portions of a given tendon from the plurality of tendons are arranged along a circumference of the plate structure. 6. The system of claim 5, wherein the plate structure is arranged at a central portion of the apex of the balloon envelope. 7. The system of claim 6, wherein the fill port is arranged at a center section of the plate structure. 8. The system of claim 1, further comprising a restraining device attached to the fill port, the restraining device is configured to secure the middle portion of a given tendon of the plurality of tendons to the apex of the balloon envelope. 9. The system of claim 8, wherein the restraining device includes at least one of a clip, nut, pin or O-ring fastener. 10. The system of claim 8, wherein the fill port includes a plurality of threads being configured to receive the restraining device. 11. An assembly comprising: a plate structure having a fill port attached to an apex of a balloon envelope, the fill port being configured to allow lift gas to pass into balloon envelope; anda plurality of tendons arranged over the plate structure, each tendon of the plurality of tendons having a first portion, a second portion, and a middle portion disposed between the first portion and the second portion, wherein the first portion of a given tendon is arranged to engage a first section of the plate structure and the second portion of the given tendon is arranged to engage a second section of the plate structure opposite of the first section and the middle portion is arranged to wrap around the fill port of the plate structure. 12. The assembly of claim 11, wherein the tendon includes webbing. 13. The assembly of claim 11, wherein the middle portion includes a split in the webbing to allow a portion of the fill port to pass through the webbing. 14. The assembly of claim 13, wherein the fill port is configured so that the middle portion of one or more given tendons from the plurality of tendons can be stacked up at the apex of the balloon envelope. 15. The assembly of claim 11, wherein the first and second portions of a given tendon from the plurality of tendons are arranged along a circumference of the plate structure. 16. The assembly of claim 15, wherein the plate structure is arranged at a central portion of the apex of the balloon envelope. 17. The assembly of claim 16, wherein the fill port is arranged at a center section of the plate structure. 18. The assembly of claim 11, further comprising a restraining device attached to the fill port, the restraining device is configured to secure the middle portion of a given tendon of the plurality of tendons to the apex of the balloon envelope. 19. The assembly of claim 18, wherein the restraining device includes at least one of a clip, nut, pin or O-ring fastener. 20. The assembly of claim 18, wherein the fill port includes a plurality of threads being configured to receive the restraining device.