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1. (WO1980002543) APPAREIL ET PROCEDE D"EMBALLAGE
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

Claims

1. A wrapping apparatus comprising: a longitudinally extending base having front and rear ends; a heat table on said base between said ends; a wrapping- material guide member which is elongate and
extends transverse to the base and is located
above and behind said heat table and movably mounted to said base to move downward toward said table; and a work support table mounted to said base ahead of said heat table and having a generally upstanding back portion to receive the work thereon, and a rearwardly projecting support shelf adjacent said heat table.

2. The apparatus of claim 1 and further comprising:
an elongate hot strip means on said base parallel to said guide member and immediately ahead of the path of downward movement of said member, for heat severing wrapping material along a line transverse to the base.

3. The apparatus of claim 2 wherein: said guide member is mounted to said base to move in an
arcuate path about a first pivot axis parallel to said guide member; said hot strip means is a
heated rod immediately behind said heat table; and the mounting of said guide member establishes said arcuate path passing immediately behind said heated rod.

The apparatus of claim 3 and further comprising:
wrapping-material supply means behind said guide member and including shaft means mounted to said base and extending parallel to said guide member.

5. The apparatus of claim 3 wherein: said work
support table is pivotally mounted said base to
pivot on a second pivot axis parallel to said first
pivot axis.

6. The apparatus of claim 5 wherein: said work
support table is pivotal from a forwardly inclined
position, rearwardly about said second pivotal axis
to an upright position wherein said shelf thereof
is substantially parallel and co-planar with the
top of said heat table.

7. The apparatus of claim 3 and further comprising:
guide member mounting means including a pair of
side arms, each pivotally mounted to said base at
said first pivot axis, and a lower bight portion,
transverse to said base and connected to said
arms at a level below said first pivot axis,
said side arms and bight portion forming a clevis;
said guide member being mounted to said side arms
above said first pivot axis.
- 8. The apparatus of claim 7 wherein: said bight
portion is behind of said first pivot axis, and
said guide member is ahead of said first pivot
axis, with said side arms extending upwardly and
forwardly from said bight portion through said
first pivot axis to said guide member.

9. The apparatus of claim 7 and further comprising:
a workpiece support table extending rearwardly
behind said hot strip means and below said guide
member; said clevis and guide member are balanced
to normally maintain said guide member spaced above
said workpiece support table, but accommodate
downward movement of said guide member in said

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arcuate path under the weight of an item of work
to be wrapped.

10. The apparatus of claim 9 wherein: said guide
member is a roller, rotatably mounted to shaft
means affixed in yokes at upper ends of said
arms.

11. The apparatus of claim 9 wherein: a transverse,
upwardly opening recess is provided between said
heat table and said workpiece support table to
receive said guide member therein when moved
downward by the weight of an item of work to be
wrapped as the item is lowered from the support
table onto the heat table.

12. The apparatus of claim 11 wherein: said heated
rod is at the front of said recess and said guide
member is receivable behind it in said recess.

13. The apparatus of claim 6 wherein: said base has
a front crossmember at said front end; and said
shelf is engageable with an upper edge of said
front crossmember upon rearward pivoting of said
work support table to limit said pivoting to
place said shelf in said substantially co-planar
position.

14. The apparatus of claim 13 wherein: a pivot stop
is coupled to said work support table and engageable with said front crossmember to limit the amount
of forward incline of said work support table.

15. A method of wrapping an item of work comprising
the steps of: pulling a strip of wrapping material

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a forwardly inclined support table and down in front
of at least a portion of said table so that a
leader portion of said strip hangs down in front
of said table; placing a work item on top of the
strip on top of the back of the table, while said
leader portion continues to hang in front of said
table; lifting the leader portion and turning it
back and downward over the top and part of the
back of the work item; holding the leader portion
against the back of the work item and tipping
the work item upward, backward and downward onto
a heat table and thereupon heat sealing the
leader portion to a portion of said strip under
said back to complete a 360° wrap of the work item.

16. The method of claim 15 and further comprising
the steps of: shrinking the strip onto the item
during the heat sealing step.

17. The method of claim 15 and further comprising the
step of: engaging a strip guide member during the
tipping step, and depressing the guidemember and
thereby a portion of the strip trailing from a lower
edge of said work item, toward said heat table.

18. The method of claim 17 wherein said engaging and
depression steps are by contact with said item
as sides of the item are gripped by left and right
hands of an operating person.

19. The method of claim 17 wherein: the guidemember
depression step depresses part of said trailing
portion onto a heat severing member to cut off the
trailing portion behind said heat table.

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20. The method "of claim 19 and further comprising
the steps of: picking up the 360° wrapped item, turning side marginal portions of wrapping strip around the sides of the item and sealing them
against the back.

21. The method of claim 20 wherein: said sealing of marginal portions is by placing the item down
on the heat table again with the marginal portions against the back and heat table.

22. The method of claim 15 and further comprising the steps of: pivoting the support table upward
during the upward portion of said tipping step, and stepping upward movement of the table while the work item is tipped backward and downward.

23. The method of claim 22 wherein: the work item is rested on a rearwardly projecting support shelf at the end of said placing step.

24. The method of claim 23 wherein: the strip
pulling step is from a selected one of a plurality of wrapping film rolls in vertically stacked
spaced relationship behind the heat table.

AMENDED CLAIMS
(received by the International Bureau on 3 July 1980 (03.07.80))

1. Apparatus for wrapping an article with a thermoplastic material and sealing the thermoplastic material
therearound comprising a frame adapted to be supported on a surface having a front end and a rear end spaced therefrom, a platen mounted on said frame between said ends , said platen having a surface adapted to be heated for sealing juxtaposed layers of said thermoplastic material, a table at the front end of said frame adjacent said platen for supporting said article to be wrapped, a supply of thermoplastic material for wrapping said article, means mounting said supply of thermoplastic material at the rear end of said frame whereby said thermoplastic material may be drawn to said table to
locate a length adjacent a leading end on said table below said article said leading end there adapted to be folded over said article to partially envelop the same providing one of said juxtaposed layers, means mounting said table for movement pivotally along a path of movement toward and away from said platen
whereb as said article moves with said table said pivoting movement along said path acts to continuously tension said thermoplastic material, a guide member located between said platen and said supply of thermoplastic material for guiding said thermoplastic
material toward said table, and means mounting said guide member for movement relative to said platen
along a path of movement from a first position to a second position at which a portion of said thermoplastic material, providing the other of said
juxtaposed layers, is located in contact with said platen, said article during pivotal movement toward said platen moving said guide member from said first to said second position whereby said thermoplastic material is further continuously tensioned and said juxtaposed layers are sealed.

2. Apparatus of claim 1 further comprising a cut-off
member disposed in a recess adjacent said second
position, said cut-off member acting in concert
with said guide member to sever said thermoplastic
material substantially simultaneously with the sealing of said juxtaposed layers.

3. Apparatus of claim 2 wherein said cut-off member
comprises a heated rod to heat sever said thermoplastic material, said cut-off member being elongated, disposed perpendicular to the axis of said thermoplast material and of a length at least equal to the width of said thermoplastic material.

4. Apparatus of claim 1 wherein said guide member compris a roller, said roller bei'ng disposed perpendicular to the axis of said thermoplastic material.

5. Apparatus of claim 4 wherein said means mounting
said guide member includes a pair of arms , each arm mounted to a pivot axis on said frame laterally outward of the side edge of said thermoplastic materia said guide member mounted on one end of each arm to overlie said thermoplastic material, and a counter balance mounted on the other end of each arm whereby said guide member is located normally in said first position.

6. Apparatus of claim 1 wherein said table includes a shelf at one end extending toward said platen for
supporting the lower end of said article.

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7. Apparatus of claim 6 wherein said frame includes
a stop to limit movement of said table toward said
platen to a substantially upright position and
said shelf to a position substantially coplanar with that of said surface whereby said shelf provides a
fulcrum about which said article pivots in completing movement to said platen.

8. Apparatus of claim 1 wherein said article comprises a plurality of sheets of paper in a stack and said
theremoplastic material is a film.

9. A method of wrapping an article with a thermoplastic ' material and sealing the thermoplastic material
therearound comprising pulling a strip of thermoplastic material from an endless source and substantially simultaneously threading and guiding said
strip along a first path toward a support for sup- porting a portion of said strip adjacent a leading
end, placing said article to be wrapped on said
supported portion of said strip, locating said leading end and the unsupported length around said article to partially envelop the same, and thereafter pivoting said article as it is partially enveloped about a
fulcrum toward said source and at substantially the same time as said article undergoes said pivoting
movement to continuously tension said strip of thermoplastic material said article causes movement of
said strip from said guided path to locate both said enveloped leading end and heretofore guided strip to a heated surface for sealing said layers to complete a 3.60° wrap.

10. The method of claim 9 further comprising shrinking
the strip onto the article as said layers are sealed.

11. The method of claim 9 severing the sealed layers
of the 360° wrap from the nonwrapped strip of
thermoplastic material.

12.-24. (CANCELLED)

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