Vacuum assisted roll apparatus and method
Valve bag
Valve bag manufacture
Valve bag manufacture
Valve for valved bags
Valve sleeves and methods of inserting the same
Valve type bag and method of making same
Valved bag
Valved bag and its manufacture
Valved bags
Valved containers of flexible plastic material
Valved plastic bag and method of making same
Valved plastic bags
Valved sack
Valved sack
Valved sacks
Valved thermoplastic bag
Variable pleat filter paper pleating process and apparatus
Visible file pocket and methods of manufacture thereof