US Patent Class 383
FLEXIBLE BAGS



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Current as of: June, 1999
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  DF  CLASS NOTES
1  DF  BIODEGRADABLE FEATURE
2  DF  SELECTIVELY ADJUSTABLE VOLUME
3  DF  INFLATABLE
4  DF  CONVERTIBLE
5  DF  TAMPER INDICATING
6  DF  LIFTING OR SUSPENDING ELEMENT (E.G., HANDLE)
7  DF  .~ Unitary with bag (e.g., element formed by hand hole)
8  DF  .~.~ Loop extending between opposite walls
9  DF  .~.~ Bag material includes aperture for rodlike support
10  DF  .~.~ Bag material includes hand-receiving aperture
11  DF  .~ Magnetic or adhesive-type element (includes Velcro)
12  DF  .~ Attached to bag frame
13  DF  .~ Detachable
14  DF  .~ With provision for positioning element in nonuse location
15  DF  .~ Plural interengaging elements
16  DF  .~ Plural elements located at diverse bag regions (i.e., bag bottom, bag middle, and/or bag top)
17  DF  .~ Including reinforcement or stress distribution means attached to or adjacent element
18  DF  .~.~ Extending across bag bottom
19  DF  .~.~ Extending axially through bag interior to bag bottom
20  DF  .~.~ Additional layer of material at element attachment location
21  DF  .~ Attached to distinct end wall
22  DF  .~ Hanging element
23  DF  .~.~ Hook-type
24  DF  .~.~ Closed loop
25  DF  .~ Single element
26  DF  .~.~ Bag includes opening through bag material to receive element
27  DF  .~.~.~ Opening extending through fold or folded bag portion
28  DF  .~.~ Secured to bag interior
29  DF  .~.~ Straddles bag mouth
30  DF  .~.~ Secured to folded bag closure
31  DF  .~.~.~ Closure flap
32  DF  WITH STACKING FEATURE
33  DF  WITH MEANS TO MAINTAIN THE BAG MOUTH IN AN OPEN CONFIGURATION
34  DF  .~ Hinged mouth stiffeners
34.1  DF  .~.~ Stiffeners include four or more hinged segments
35  DF  WITH MEANS TO FACILITATE MANUAL SEPARATION OF FLATTENED BAG WALLS
36  DF  WITH INTEGRAL FUNNEL
37  DF  PLURAL
200  DF  BAG HAVING MEANS TO FACILITATE OPENING IT BY SEVERING BAG MATERIAL OR BAG PART (E.G., TEARING, CUTTING, PIERCING, ETC.)
201  DF  .~ Tearing facilitated by specified fiber or molecular orientation
202  DF  .~ Combined with, or modified for opening by, a sharp-edged cutting implement or a piercing implement
203  DF  .~ Including means for reclosing the bag
204  DF  .~.~ Including a bag portion which is completely separated from the bag during tearing (e.g., tear strip)
205  DF  .~ Including a separate tearing element which is gripped and pulled to open the bag
206  DF  .~.~ Cord, string, wire, or thread
207  DF  .~ Line of weakness delineates substantially the entire tearing path
208  DF  .~.~ Line of perforations having means for preventing leakage before opening
209  DF  .~.~ Bag portion completely separated from the bag during tearing
210  DF  BAG CLOSURE SECURED BY A RELEASABLE OR FRANGIBLE BOND (E.G., PEEL SEAL)
211  DF  .~ Adhesive bond
38  DF  COMPARTMENTED
39  DF  .~ Compartment-forming member secured to backing
40  DF  .~ Including auxiliary compartment
41  DF  WITH PLURAL ACCESS OPENINGS
42  DF  WITH CLOSURE
43  DF  .~ Self-closing type
44  DF  .~.~ Responsive to content (e.g., valve)
45  DF  .~.~.~ With vent
46  DF  .~.~.~ With closure reinforcing or stiffening means
47  DF  .~.~.~ With means to facilitate opening closure
48  DF  .~.~.~ With supplemental closing feature
49  DF  .~.~.~.~ Resilient
50  DF  .~.~.~.~ Reversely folded portion of closure element
51  DF  .~.~.~.~ Slit or slot
52  DF  .~.~.~.~ Adhesive
53  DF  .~.~.~ In distinct end wall
54  DF  .~.~.~.~ Including separate closure element
55  DF  .~.~.~ Folded bag corner
56  DF  .~.~.~.~ Including separate closure element
57  DF  .~.~.~ Closure includes inwardly folded bag wall portions
58  DF  .~.~.~ Overlying access opening in bag material
59  DF  .~ Including auxiliary means for forming leakproof closure seal
60  DF  .~.~ Annular gasket
61  DF  .~ Multiple independent closures for single access opening
62  DF  .~ With provision for positioning closure element in nonuse location
63  DF  .~ Rib and groove
64  DF  .~.~ With sliding element
65  DF  .~.~ Including means to facilitate disengagement
66  DF  .~ For access opening in sidewall
67  DF  .~ For access opening in bag bottom
68  DF  .~ Elongated clamping elements
69  DF  .~.~ Sliding
70  DF  .~ Twisted bag mouth
71  DF  .~ Gathered bag mouth
72  DF  .~.~ Including drawstring-type securing element
73  DF  .~.~.~ With mouth opening aid
74  DF  .~.~.~ With means to maintain the securing element in closed configuration
75  DF  .~.~.~ In bag hem
76  DF  .~.~.~ Through bag openings
77  DF  .~.~ Securing element consisting of unitary bag portion
78  DF  .~ Including separate closure element for straddling bag mouth (i.e., overlaps exterior portions of opposed bag walls)
79  DF  .~.~ Including securing element designed to extend through aligned openings in closure element (e.g., stitching)
80  DF  .~.~ Cap-type
81  DF  .~.~ Reusable
82  DF  .~.~.~ Bag walls designed to be rolled together or folded on common fold line
83  DF  .~.~ Bag walls designed to be rolled together or folded on common fold line
84  DF  .~ Including closure flap which overlaps sidewall exterior when closed
85  DF  .~.~ Bag walls designed to be rolled together or folded on common fold line
86  DF  .~.~ Reusable
86.1  DF  .~.~.~ Including fastening element removably extending through aperture in bag material
86.2  DF  .~.~.~.~ Aperture extends through closure flap
87  DF  .~.~.~ Flap side edges permanently secured to bag (e.g., sandwich bag type)
88  DF  .~ Bag walls designed to be rolled together or folded on common fold line
89  DF  .~.~ With separate securing element for roll or fold
90  DF  .~.~.~ Element extends substantially 180 degrees or more around roll or fold
91  DF  .~.~.~.~ Element extends around side edge
92  DF  .~ Including securing element designed to extend through aligned openings in bag material (e.g., stitching)
93  DF  .~ Closure within bag
94  DF  .~.~ Heat seal
95  DF  .~.~ Reusable
96  DF  .~.~.~ Stopper or plug
97  DF  .~.~.~ Zipper
98  DF  .~ Overlapped flaps
99  DF  .~.~ Reusable
100  DF  WITH VENTING OR VENTILATION MEANS
101  DF  .~ Fluid circulates between bag plies
102  DF  .~ Pervious material
103  DF  .~ Opening in bag material
104  DF  FREE-STANDING
105  DF  WALL DETAILS
106  DF  .~ Transparent portion or window
107  DF  .~ Specified seam structure
108  DF  .~.~ Waterproof
109  DF  .~ Multi-layer or ply
110  DF  .~.~ Insulated
111  DF  .~.~ Removable ply
112  DF  .~.~ Stretchable layer or ply
113  DF  .~.~ Barrier layer or ply (e.g., waterproof)
114  DF  .~.~ Including specified end structure
115  DF  .~.~.~ Overlapping extension formed by cuts in bag wall
116  DF  .~.~ Coating or lamination
117  DF  .~ Woven or mesh-type material
118  DF  .~ Stretchable
119  DF  .~ Reinforced
120  DF  .~ Pleated or gusseted
121  DF  END STRUCTURE (E.G. BOTTOM)
121.1  DF  .~ Rigid bottom
122  DF  .~ Seamless
123  DF  .~ Formed by folding bag walls on common fold line and joining together
124  DF  .~.~ Foldable to form distinct end wall
125  DF  .~ Overlapping extensions of opposed walls
126  DF  .~.~ Extension formed by cuts in bag wall
127  DF  MISCELLANEOUS
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CROSS-REFERENCE ART COLLECTIONS
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901  DF  HOT WATER OR ICE BAG
902  DF  HAVING NONBAG USE
903  DF  STRESS RELIEF
904  DF  FILLING TUBE
905  DF  DEAD FOLD (DUCTILE) CLOSURE ELEMENT
906  DF  DISPENSING FEATURE
907  DF  PECULIAR, PARTICULAR SHAPE
908  DF  MATERIAL HAVING SPECIFIED GRAIN DIRECTION OR MOLECULAR ORIENTATION