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eXempla Engineering

eXempla Engineering. Eram Haider , Eric Helton, Ryan Tidwell. Group Development. Eram Haider - Group Leader Eric Helton- Timekeeper Ryan Tidwell- Scribe. Problem Identification. Markers dry out if their caps are not put on properly

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eXempla Engineering

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  1. eXempla Engineering EramHaider, Eric Helton, Ryan Tidwell

  2. Group Development • EramHaider- Group Leader • Eric Helton- Timekeeper • Ryan Tidwell- Scribe

  3. Problem Identification Markers dry out if their caps are not put on properly Markers lose their ability to write if their caps are left off too long ornot on properly If a marker’scapis left off for too long or put on improperly, it will dry out Marker Caps must be securely shut otherwise the markers will dry out. Green Text- Added Black Text- Stayed the same Strike Through- Deleted in next draft

  4. Justification • Surveys • Test

  5. Justification Surveys • E-mailed surveys • Teachers and students • Principals

  6. Justification Test #1 • Research average life span of unused marker • Take ten marker caps off • leave them on book shelf • Record average life span of ten markers • Compare to average life of unused marker

  7. Justification Test #2 • When markers are needed give ten dried markers • Observe reaction after each marker use • Give five working markers, five dried markers • Observe reaction after each marker • Give ten working markers observe reaction

  8. Research • Patents • Patent number: 7488130 • Airtight seal for marker • Patent number: D566766 • Original Marker Cap • Patent number: D591352 • Retractable pen • Patent number: 7465112 • Retractable marker • Patent number: 6471432 • Ergonomic marker

  9. Criteria/Constraints • Must fit in a child’s hand • Have as little amount of force to depress • Must be recyclable • Simple enough to operate • Must be non-toxic and safe • Life expectancy longer than leading brand

  10. Decision Process • Brainstorming • Narrowed designs to top 9 • Design Matrix • Selected Final

  11. Brainstorming • Each person came up with as many as possible • Discussed each design to group • All ideas were acknowledged

  12. Designs

  13. Design Matrix

  14. Final Decisions • 11 • 17 • 21

  15. Design • 21

  16. Prototype/Proof of Concept

  17. Test • Life Expectancy • Durability • Wire • Automatic Assembly/Fatigue test • Airtight

  18. Life Expectancy • Innovated marker vs. standard Crayola marker

  19. Durability • Wire • Maximum stress obtainable on wire • Automatic Assembly/Fatigue test • Repeatability of stress put on springs • Either Pass or Fail • Pass-

  20. Airtight • Ability of air and water seep through cracks • Outer casing and subassembly • Either pass or fail • Pass- less than 1 mL of water intake • Fail- between 1 and 2 mL of water intake

  21. Airtight • Outer casing • Three trials • Passed 2 out of 3 trials

  22. Airtight • Subassembly • Four trials • Passed 2 out of 4 trials

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