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-- Captions by VITAC -- www.vitac.com
CAPTIONS PAID FOR BY DISCOVERY COMMUNICATIONS
Narrator: THE BEST WAY TO PROTECT YOUR BICYCLE AGAINST THEFT
IS A HEAVY-DUTY LOCK.
A U-LOCK IS THE MOST SECURE OPTION.
UNLIKE A CABLE OR CHAIN LOCK,
YOU CAN'T QUICKLY SEVER A U-LOCK WITH A PAIR OF BOLT CUTTERS.
IT TAKES LARGE CONSPICUOUS TOOLS --
NOT SOMETHING A THIEF CAN LIKELY GET AWAY WITH UNOBSERVED.
U-LOCKS COME IN VARIOUS SIZES
SO THAT YOU CAN LOCK YOUR BIKE TO DIFFERENT STRUCTURES
FROM THIN BIKE RACKS TO THICKER TREE TRUNKS.
THE SHACKLE AND LOCK ARE MADE OF HARDENED HIGH-ALLOY STEEL,
WHICH IS RESISTANT TO CUTTING, SAWING, AND TWISTING.
TO SHAPE THE SHACKLE, WORKERS LOAD STEEL BARS
INTO A COMPUTER-GUIDED BENDING MACHINE.
THE MACHINE APPLIES MORE THAN 25 TONS OF FORCE
TO BEND THE BAR IN THE SHAPE OF A "U".
THE MACHINE ALSO NOTCHES EACH END OF THE SHACKLE.
THESE NOTCHES ARE WHAT RECEIVE THE LOCKING BOLTS.
TO MAKE THE STEEL HARD ENOUGH TO BE TAMPER-PROOF,
THEY SEND THE SHACKLE TO AN OUTSIDE FACILITY
FOR HEAT TREATMENT.
THIS DEMONSTRATION RE-CREATES A SMALL PART
OF THAT COMPLEX PROCESS, WHICH IS TO HEAT THE SHACKLE
TO ALMOST 1,500 DEGREES FAHRENHEIT
TO REARRANGE THE MOLECULAR STRUCTURE.
COOLED IN OIL
TO SET THE HARDNESS OF THAT REARRANGEMENT,
THEN REHEAT AT MODERATE TEMPERATURE
TO RESTORE THE FLEXIBILITY THE STEEL LOST
DUE TO THE PREVIOUS STEPS.
WHEN THE SHACKLE RETURNS TO THE FACTORY,
A LASER MACHINE PRECISION MEASURES
AND, IF NECESSARY, CORRECTS THE DIMENSIONS
AS PER SPECIFICATIONS.
THEN THE SHACKLE IS DIPPED IN DURABLE ANTI-CORROSION PAINT.
ONCE THE PAINT DRIES,
AND AUTOMATED MACHINE SLIPS A PVC TUBE OVER THE SHACKLE.
NEXT THEY SCREW A PLASTIC BRACKET
TO ONE END OF THE SHACKLE.
THIS CONNECTS TO A CORRESPONDING BRACKET
YOU SCREW TO YOUR BIKE FRAME
TO MOUNT THE LOCK ON YOUR BIKE WHEN YOU'RE CYCLING.
THE RECTANGULAR BLOCK THAT HOUSES THE LOCKING SYSTEM
IS CALLED THE LOCK BODY.
IT, TOO, IS MADE OF HARDENED STEEL.
AN AUTOMATED PRESS PUNCHES HOLES ON THE ENDS FOR THE SHACKLE
AND IN THE MIDDLE FOR THE LOCK CYLINDER.
THE LOCKING SYSTEM HAS A HOUSING IN THE CENTER FOR THE CYLINDER.
WORKERS MOUNT TWO METAL PLATES OVER IT.
WHEN YOU INSERT THE SECURITY-CODED KEY
IN THE CYLINDER IN TURN,
THE CYLINDER ROTATES WITHIN THE HOUSING
AND THE PLATES MOVE APART,
TRIGGERING OTHER COMPONENTS TO LOCK THE INSERTED SHACKLE.
THE CYLINDER IS MADE OF BRASS, A RELATIVELY SOFT METAL,
SO THERE'S AN IMPENETRABLE STEEL PLATE ON TOP
TO PREVENT A THIEF FROM DRILLING INTO IT.
WORKERS GIVE THE CYLINDER GROOVES A SQUIRT OF GREASE --
THE HOUSING, AS WELL --
THEN INSERT PINS INTO THE GROOVES.
THESE ACT AS BLOCKERS,
PREVENTING THE WRONG KEY FROM OPENING THE LOCK.
WITH THE CORRECT KEY, THEY GIVE WAY,
ENABLING THE CYLINDER TO ROTATE WITHIN THE HOUSING.
THIS SPRING APPLIES TENSION
TO THE CYLINDER'S STEEL AND DRILLING PLATE,
KEEPING IT IN POSITION
SO THAT THE KEY INSERTS EASILY INTO THE CYLINDER.
ON EACH SIDE, WORKERS INSERT A LEVER AND BOLT.
WHEN YOU TURN THE KEY TO THE LOCKED POSITION,
THE LEVER PUSHES THE BOLT INTO THE SHACKLE'S NOTCH,
IMMOBILIZING THE SHACKLE.
THIS COMPONENT SPRING-LOADS THE BOLT
TO PREVENT THE INSERTED SHACKLE FROM POPPING OUT
PRIOR TO BEING LOCKED.
A PNEUMATIC MACHINE INSERTS THE LOCKING SYSTEM
INTO THE STEEL LOCK BODY.
A TWO-TONE PLASTIC COVER GIVES THE U-LOCK A SNAZZY APPEARANCE
AND MAKES THE SURFACE EASIER FOR THE CYCLIST TO GRIP.
HERE'S HOW THE LOCK WORKS.
WHEN YOU TURN THE KEY, THE CYLINDER ROTATES.
THIS MOVES THE TWO PLATES OVER IT OUTWARD,
TRIGGERING THE LEVERS ON EACH SIDE
TO HOLD THE BOLT IN THE SHACKLE NOTCH,
LOCKING THE SHACKLE IN PLACE.
EVERY LOCK UNDERGOES AN OPENING AND CLOSING CHECK.
RANDOM SAMPLES ARE SUBJECTED
TO MORE EXTENSIVE QUALITY-CONTROL TESTING.
IT TAKES 13 TONS OF CUTTING FORCE TO BREAK THE STEEL --
FAR MORE THAN EVEN THIS LARGER-THAN-TYPICAL BOLT CUTTER
CAN APPLY.
THIS TORSIONING MACHINE MEASURES HOW MUCH TWISTING
THE U-LOCK CAN WITHSTAND.
A BIKE-ROBBER WOULD HAVE TO APPLY
MORE THAN 350 POUNDS OF FORCE WITH A CROWBAR.
THE BIKE OWNER, ON THE OTHER HAND, NEEDS ONLY THE CODED KEY.
Narrator: THE NATIVE NORTH AMERICAN TEPEE
WAS DESIGNED TO BE A HOME WHERE THE BUFFALO ROAMED.
CENTURIES AGO,
TRIBES WERE CONSTANTLY ON THE MOVE HUNTING THE BUFFALO,
WHICH WAS THEIR MAIN SOURCE OF FOOD.
EASY TO PACK UP AND REASSEMBLE,
THE TEPEE SERVED AS A PORTABLE SHELTER
FOR THIS NOMADIC LIFESTYLE.
TODAY, PEOPLE ARE REDISCOVERING THE APPEAL
OF A CONE-SHAPED TENT WITH A COOK FIRE INSIDE,
AND THAT'S PUT THE TEPEE ON THE COMEBACK TRAIL.
NO NEED TO HAND-STITCH TEPEES ANYMORE.
TODAY, THEY PRODUCE THEM AT A FACTORY
USING INDUSTRIAL SEWING MACHINES.
THEY START WITH THE FRONT PANEL.
IT'S THREE LAYERS OF CANVAS AND VINYL.
THEY SEW DETAILS LIKE POCKETS FOR POLES TO OPEN SMOKE FLAPS
AND RECTANGULAR PATTERNS
TO PREVENT STRETCHING AND TEARING
FROM HOLES FOR LACING THE FRONT OF THE TEPEE TOGETHER
WHEN PITCHED.
THE SEWER NOW CHOPS THROUGH THE THREE LAYERS OF FABRIC
WITH A CHISEL TO MAKE THOSE HOLES.
ANOTHER SEWER STITCHES STRIPS OF BUFFALO HIDE TO THE DOOR OPENING
TO MAKE IT MORE RUGGED.
USING A PATTERN AS A GUIDE,
THE NEXT WORKER CUTS ANOTHER PANEL ON A SLIGHT CURVE.
HE THEN PIECES TOGETHER PANEL AFTER PANEL
TO CONSTRUCT THE REST OF THE TEPEE CONE.
HE REINFORCES THE HEM WITH HEAVY NYLON WEBBING.
HE TUCKS LOOPS BETWEEN THE WEBBING AND THE FABRIC
AND SECURES THEM WITH MORE STITCHING.
THE LOOPS WILL BE USED TO STAKE THE TEPEE TO THE GROUND.
THE TEAM STRETCHES OUT THE COMPLETED TEPEE COVER.
AN ARTIST MAPS OUT SOME LINES FOR PAINTING ON THE FABRIC.
THERE'S 73 YARDS OF IT.
IT BECOMES A HUGE CANVAS FOR TRADITIONAL ARTISTRY.
THE DESIGNS ARE SOUTHWEST AMERICAN IN STYLE
AND HIGHLY SYMBOLIC.
CIRCLES CAN REPRESENT PHASES OF THE MOON OR THE SUN.
A SAMPLE OF THE ARTWORK HAS BEEN DRAWN UP BEFOREHAND
FOR THE CLIENT, AND THE ARTIST REFERS TO IT AS SHE WORKS.
SHE BRUSHES EXTERIOR LATEX PAINT THINNED WITH WATER
AROUND THE PERIMETER OF THE DESIGNS.
THEN SHE SOAKS UP PAINT ONTO A PAD
AND PRESSES IT TO THE FABRIC WITHIN THE PAINTED LINES.
THIS AVOIDS BRUSHSTROKES
AND PRODUCES A FLAT FINISH THAT ALMOST LOOKS LIKE DYE.
WITH THE ARTWORK COMPLETE,
THE TEPEE COVER NOW MAKES A COLORFUL STATEMENT.
OUTSIDE, AN EMPLOYEE SHAVES THE BARK OFF YOUNG TREES
TO PREPARE THE POLES.
THERE ARE 17 PER TEPEE.
EACH ONE IS 27 FEET TALL --
THE HEIGHT OF A TWO-STORY BUILDING.
A TWO-PERSON TEAM NOW ARRANGES THREE OF THE POLES
IN A SPECIFIC SEQUENCE, TO BUILD THE TRIPOD
THAT IS THE BASIC FRAMEWORK OF THE TEPEE.
THE ASSEMBLER LASHES THE POLES NEAR THE TOP
WITH THICK ROPE AND A TIGHT KNOT.
HE LEAVES A LENGTH OF ROPE TO DANGLE AS THEY RAISE THE TRIPOD.
THE ROPE WILL COME IN HANDY LATER ON.
THE ARRANGEMENT SITUATES THE DOOR POLE
EAST TOWARDS THE RISING SUN AND AWAY FROM WESTWARD WINDS
THAT COULD INTERFERE WITH THE COOK FIRE.
THE TEAM PROPS UP THE REMAINING POLES
BETWEEN THE MAIN TRIPOD POLES.
THE FIRST TWO GROUPS OF POLES FORM THE FRONT OF THE TEPEE,
AND A THIRD GROUP FORMS THE BACK.
THE ASSEMBLER GRABS THE ROPE
THAT STILL DANGLES FROM THE CENTRAL TRIPOD,
AND, FROM THE GROUND,
WINDS IT AROUND ALL THE POLES WHERE THEY MEET AT THE TOP.
THE LAST POLE IS CALLED THE LIFTING POLE.
IT'S USED TO LIFT THE PAINTED TEPEE COVER TO THE WOOD FRAME.
THEY UNBUNDLE THE COVER AND WRAP IT AROUND THE POLES
LIKE A BLANKET AROUND A PERSON'S SHOULDERS.
ONCE THE FIT IS NICE AND SNUG,
HE LACES THE FRONT PANELS TOGETHER
USING WILLOW BRANCHES FOR LACING PINS.
THERE ARE 18 PINS IN TOTAL
FASTENED ABOVE AND BELOW THE DOORWAY.
HE PEGS THE CANVAS TO THE GROUND AND THEN INSTALLS TWO LAST POLES
FOR OPENING AND CLOSING THE SMOKE FLAPS FROM THE GROUND.
TRADITIONAL IN DESIGN
WITH MODERN-DAY MATERIALS AND CONSTRUCTION,
THE TEPEE IS STILL AN IDEA WORTH PITCHING.
Narrator: "CROISSANT" IS THE FRENCH WORD FOR "CRESCENT."
THIS FLAKY, CURVED ROLL IS GENERALLY ASSOCIATED WITH FRANCE
EVEN THOUGH MANY FOOD HISTORIANS BELIEVE
ITS ORIGINS ARE AUSTRIAN.
REGARDLESS OF WHERE IT CAME FROM,
THE CROISSANT IS A POPULAR BREAKFAST PASTRY
IN MANY PARTS OF THE WORLD.
PLAIN, WITH JAM, OR DIPPED IN A CUP OF COFFEE,
THERE'S NOTHING LIKE THE LIGHT, FLAKY TEXTURE
AND BUTTERY FLAVOR OF A CROISSANT.
THIS COMMERCIAL BAKERY MAKES ITS CROISSANTS
WITH SOFT-SPREAD MARGARINE IN LIEU OF BUTTER.
THE OTHER INGREDIENTS ARE YEAST, VERY COLD WATER --
BECAUSE WARM WATER WOULD TRIGGER THE YEAST
TO REACT PREMATURELY --
SUGAR, A TOUCH OF SALT, AND WHITE ALL-PURPOSE FLOUR.
ALL THE INGREDIENTS GO INSIDE AN INDUSTRIAL MIXER
FOR 10 MINUTES --
FIRST AT SLOW SPEED TO BLEND EVERYTHING AND FORM THE DOUGH,
THEN FASTER TO KNEAD IT.
NEXT THE STICKY, ELASTIC DOUGH ENTERS THE MUTLI-ROLLER MACHINE.
AS AN AUTOMATED DISPENSER
LIGHTLY DUSTS THE DOUGH WITH FLOUR
TO PREVENT IT FROM STICKING TO THE EQUIPMENT,
A SERIES OF 16 ROLLERS PROGRESSIVELY FLATTENS THE DOUGH
INTO A THINNER AND THINNER SHEET.
THE NEXT PROCESS, LAMINATION,
IS WHAT CREATES THE CROISSANT'S FLAKY LAYERS.
THE FIRST STATION ON THIS LINE
EXTRUDES 44-POUND BLOCKS OF MARGARINE
INTO A 2/10-OF-AN-INCH-THIN SHEET.
THE NEXT STATION LAYS THE MARGARINE SHEET
ON TOP OF THE THIN DOUGH SHEET
THEN FOLDS THE ENDS OF THE DOUGH UPWARD,
ENVELOPING THE MARGARINE.
THEN ROLLERS COMPRESS THE OVERLAPPED DOUGH ENDS
TO SEAL THE MARGARINE INSIDE
AND FLATTEN THE WHOLE THING DOWN TO ABOUT 4/10-OF-AN-INCH THICK.
THE NEXT STATION REPEATEDLY FOLDS THE DOUGH OVER ITSELF,
THEN, WITH ROLLERS AGAIN,
PRESSES THE LAYERS INTO A THIN SHEET.
THIS LAMINATING CYCLE REPEATS OVER AND OVER AGAIN
UNTIL EACH DOUGH BLOCK COMING OFF THE LINE
COMPRISES 243 LAYERS.
PLASTIC WRAP KEEPS THE DOUGH MOIST
AS IT NOW UNDERGOES EIGHT HOURS OF REFRIGERATION.
THE COLD RE-HARDENS THE BY-NOW SOFTENED MARGARINE
AND LESSENS THE DOUGH'S ELASTICITY.
THE DOUGH IS NOW READY FOR THE AUTOMATED MACHINE
THAT FORMS THE CROISSANTS.
THE FIRST ROLLERS PROGRESSIVELY FLATTEN THE CONNECTED BLOCKS
INTO A THIN SHEET.
THEN ANOTHER ROLLER RUNS OVER THE DOUGH HORIZONTALLY
TO EXPAND THE SHEET TO THE REQUIRED WIDTH.
NEXT CUTTERS DIVIDE THE SHEET INTO SEVEN THIN BANDS,
EACH ONE FOUR INCHES WIDE.
THEN A ROLLER SURFACED IN TRIANGULAR BLADES
CUTS EACH BAND OF DOUGH INTO TRIANGLES.
A ROBOT SEPARATES THE TRIANGLES
AND TURNS THEM ALL IN THE SAME DIRECTION
WITH THE FLAT SIDE FORWARD.
A STOPPER RUNNING THE WIDTH OF THE CONVEYOR BELT
ALIGNS THE TRIANGLES IN STRAIGHT ROWS
FOR THE NEXT STATION,
INSIDE WHICH A DEVICE ROLLS EACH TRIANGLE
INTO THE SHAPE OF THE CROISSANT.
THE BAKERY'S TWO FORMING MACHINES
OUTPUT 50,000 RAW-DOUGH CROISSANTS PER HOUR.
NEXT STOP -- THE PROOFER, A STEAM CHAMBER INSIDE WHICH
THE HEAT AND HIGH HUMIDITY ACTIVATE THE YEAST.
THE DOUGH RISES,
AND BY THE TIME THE CROISSANTS EXIT AN HOUR LATER,
THEY'VE DOUBLED IN SIZE.
THEY NOW BAKE FOR 14 MINUTES IN A TUNNEL OVEN
AT A TEMPERATURE OF 350 DEGREES FAHRENHEIT.
THE MOISTURE IN THE DOUGH EVAPORATES,
THE RESULTING STEAM, ALONG WITH THE MELTING MARGARINE,
PRODUCING AIR BUBBLES WHICH SEPARATE THE LAYERS,
CREATING THAT SIGNATURE FLAKINESS.
THE CROISSANTS ARE NOW FULLY BAKED,
GOLDEN BROWN, AND FRAGILE.
SOFT RUBBER SUCTION CUPS DELICATELY TRANSFER THEM
TO A CONVEYOR BELT.
THE BELT LEADS TO A SPIRAL TOWER.
BY THE TIME THE CROISSANTS DESCEND TO THE BOTTOM,
THEY'VE COMPLETELY COOLED.
AS THEY TRAVEL TO PACKAGING,
A QUALITY INSPECTOR PULLS ANY MISSHAPEN CROISSANT.
A MULTI-TASKING ROBOT SLAPS AN ADHESIVE LABEL
ON PLASTIC BAGS,
COUNTS OUT AND DROPS IN TWO DOZEN CROISSANTS,
THEN SECURELY SEALS THE BAGS TO LOCK IN THE FRESHNESS
UNTIL THE CROISSANTS REACH YOUR BREAKFAST TABLE.
Narrator: THOUSANDS OF YEARS AGO, SOMEONE INVENTED THE WHEEL.
IN 1970, THIS FUNDAMENTAL INVENTION WAS APPLIED TO LUGGAGE
THANKS TO AN AMERICAN LUGGAGE EXECUTIVE
WHO CAME UP WITH THE CONCEPT
WHILE CARRYING HEAVY BAGS ON A TRIP.
BY THE 1980s, VIRTUALLY ALL LUGGAGE HAD WHEELS.
TODAY, WE TAKE ROLLING LUGGAGE WITH US EVERYWHERE WE TRAVEL.
THEY TAKE THE HEAVY LIFTING OUT OF A TRIP
SO IT FEELS MORE LIKE A VACATION.
THESE HARD-SHELL ROLLING BAGS
START WITH POLYPROPYLENE PELLETS.
IT'S A SYNTHETIC MATERIAL.
THEY ADD A SMALL AMOUNT OF COLORED POLYPROPYLENE PELLETS
TO THE UNCOLORED ONES.
THEY'LL ACT AS A DYE FOR THE BATCH.
THEY ALLOW THE MIX TO DRY FOR AN HOUR,
GETTING RID OF HUMIDITY THAT WOULD FREEZE IN ICY TEMPERATURES
AND CAUSE THE LUGGAGE TO FRACTURE.
THEY MIX AND MELT THE POLYPROPYLENE PELLETS
INTO A THICK BLUE LIQUID.
THEN IT'S OVER TO THE INJECTION MOLDING SYSTEM.
THE MOLDS CLOSE
AND A NOZZLE INJECTS THE LIQUID POLYPROPYLENE.
THE MOLDS ARE EQUIPPED WITH A COOLING SYSTEM
SO THAT THE POLYPROPYLENE HARDENS ALMOST INSTANTLY
INTO A LIGHTWEIGHT YET DURABLE MATERIAL.
A PILE OF PELLETS BECOMES HALF OF A LUGGAGE SHELL
IN MERE SECONDS.
A ROBOT TRANSFERS THE MOLDED SHELL TO THE NEXT STATION.
AN EMPLOYEE GLUES THE COMPANY LOGO INTO A SLOT.
TO ENSURE IT REALLY STICKS, IT'S OVER TO THE LOGO MACHINE.
IT USES HYDRAULIC ENERGY
TO PRESS THE LOGO FIRMLY INTO POSITION.
HE NOW SCREWS A SERVICE HANDLE INTO ITS MOLDED SLOT.
THIS HANDLE IS FOR THOSE TIMES
WHEN THE TRAVELER HAS TO LIFT THE BAG BY HAND, UP STAIRS,
OR ONTO A BAGGAGE BELT.
THESE TRIANGULAR MOLDED PARTS ARE THE SIDE FEET.
THEY'LL KEEP THE LUGGAGE UPRIGHT.
HE FASTENS THEM ONTO THE BASE OF THE SHELL.
IT'S TIME TO CLOSE THIS BAG.
HE ADDS THE OTHER HALF.
HE THREADS A STEEL ROD INTO HINGE HOLES
TO HOLD THE TWO SHELLS TOGETHER.
NEXT THEY MOLD WHEELS FROM NYLON.
A ROBOT TRANSFERS THE WHEELS TO ANOTHER PART OF THE MOLD.
THE MOLD CLOSES AND A NOZZLE PIPES IN HOT LIQUID RUBBER
TO APPLY IT TO THE ROLLING SURFACE
OF THE WHEELS.
THE RUBBER ADHERES TO THE NYLON AND SOLIDIFIES.
THEY ATTACH TWO WHEELS TO A POLYPROPYLENE HUB
FOR STABLE SWIVELING ACTION.
A FACTORY WORKER NOW INSERTS AN EXTENDABLE HANDLE.
THEN, WORKING FROM THE INSIDE,
SHE SCREWS THE HANDLE TO THE LUGGAGE SHELL.
SHE REINFORCES THE CONNECTION WITH A METAL BRACKET,
ENSURING THAT THE EXTENDABLE HANDLE
WILL HOLD FAST EVEN WHEN THE LOAD IS HEAVY.
SHE PLUGS THE WHEELS INTO THEIR SLOTS
IN THE BASE OF THE LUGGAGE.
SHE SECURES THEM WITH SCREWS.
THIS BAG IS NOW MOBILE WITH 360-DEGREE SWIVELING ACTION.
THE NEXT EMPLOYEE INSTALLS THIS WATER-RESISTANT RUBBER PIPING.
IT WILL SEAL THE BAG AND KEEP THE RAIN OUT.
SHE PRESSES IT ONTO THE EDGE OF ONE OF THE SHELLS.
SHE ATTACHES BRACKETS FOR HANGING DIVIDERS
TO THE OTHER SHELL.
SHE SNAPS THREE SIDE-LOCKS AND ONE CENTRAL COMBINATION LOCK
ONTO THE BAG.
SHE SCREWS DOWN THE HANGING DIVIDER BRACKETS.
THE FABRIC LINER, WITH ITS ZIPPERED POCKETS, GOES IN NEXT.
THE ELASTIC DIVIDERS EXTEND FROM IT TO ATTACH TO THE BRACKETS.
IT'S TIME FOR THE TUMBLE TEST.
A TECHNICIAN PLACES THE LUGGAGE IN A ROLLING STEEL DRUM,
AND IT BOUNCES AROUND.
THEY CONDUCT THIS TEST ON A RANDOM BAG
EVERY NOW AND THEN
TO CONFIRM THAT THE LUGGAGE WILL BEAR UP TO ROUGH HANDLING.
AND WITH THAT, THESE BAGS ARE READY FOR A VACATION.
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