Yuming Pang

US Patent:

7731425, Jun 8, 2010

Filed:

Jun 15, 2006

Appl. No.:

11/454168

Inventors:

Paul Lin - Portland OR, US
Yuming Pang - Portland OR, US

Assignee:

Standard Multiwall Bag Manufacturing Co. - Beaverton OR

International Classification:

B65D 33/16
B65D 33/30
B65D 30/04
B65D 30/20
B65D 30/10
B65D 30/12

US Classification:

383 78, 383 89, 383 90, 383117, 383120, 383123, 383126

Abstract:

A pinch bottom open mouth bulk material bag fabricated from polywoven material has closures at one or both ends that are non-sewn and which comprise a strip of tape running in the cross-bag direction. The tape is folded over the respective bag end, which may be modified, and is glued in place to close the end. The closure has no holes or other openings through which contaminants may enter the bag interior.

US Patent:

20030147567, Aug 7, 2003

Filed:

Feb 6, 2002

Appl. No.:

10/071758

Inventors:

Yuming Pang - Portland OR, US

International Classification:

B65D030/08
B65D030/12

US Classification:

383/113000, 383/126000

Abstract:

A block bottom bulk material bag, or satchel bottom bag, is formed from multiple plies of paper and an inner ply of plastic that is adhered to the innermost ply of paper. The bag is formed from roll-stock material that is cut into blanks. The knives that cut the blanks are registered relative to one another so that when the pinch bottom or satchel bottom is formed there is no paper surface exposed to the interior of the bag and the entire interior surface of the bag to which bulk material contained in the bag is exposed is covered with plastic.

US Patent:

20040047523, Mar 11, 2004

Filed:

Sep 11, 2003

Appl. No.:

10/660906

Inventors:

Yuming Pang - Portland OR, US

Assignee:

Standard Multiwall Bag Manufacturing Co.

International Classification:

B65D030/08

US Classification:

383/113000, 383/126000

Abstract:

A block bottom bulk material bag, or satchel bottom bag, is formed from multiple plies of paper and an inner ply of plastic that is adhered to the innermost ply of paper. The bag is formed from roll-stock material that is cut into blanks. The knives that cut the blanks are registered relative to one another so that when the pinch bottom or satchel bottom is formed there is no paper surface exposed to the interior of the bag and the entire interior surface of the bag to which bulk material contained in the bag is exposed is covered with plastic.

US Patent:

20100266223, Oct 21, 2010

Filed:

May 19, 2010

Appl. No.:

12/782935

Inventors:

Paul Lin - Portland OR, US
Yuming Pang - Portland OR, US

Assignee:

Standard Multiwall Bag Manufacturing Co. - Beaverton OR

International Classification:

B65D 33/18
B65D 30/20
B65D 30/10

US Classification:

383 78, 383114, 383120

Abstract:

A pinch bottom open mouth bulk material bag fabricated from polywoven material has closures at one or both ends that are non-sewn and which comprise a strip of tape running in the cross-bag direction. The tape is folded over the respective bag end, which may be modified, and is glued in place to close the end. The closure has no holes or other openings through which contaminants may enter the bag interior.

US Patent:

20150036952, Feb 5, 2015

Filed:

Aug 5, 2013

Appl. No.:

13/959184

Inventors:

- Beaverton OR, US
Yuming Pang - Beaverton OR, US

International Classification:

B65D 33/00
B31B 37/00
B65D 21/02

US Classification:

383116, 383 37, 493211, 493220

Abstract:

An anti-skid treatment is applied to one or both major surfaces of bulk materials bags. The treatment may be applied to any bulk material bag, but is detailed in respect of films that tend to be relatively slippery, such as oriented polypropylene (“OPP”) and biaxially oriented polypropylene (“BOPP”). In one preferred embodiment, an elastomeric polymer having a coefficient of friction higher than that of the bag material is applied in strips to one or both surfaces of the bag. A method of manufacturing the bags is also described.