B31B 70/00
Making flexible containers
Official title: Making flexible containers, e.g. envelopes or bags
B31B70/00 (Making flexible containers) appears on 2,795 US grants and 2,290 published applications in this corpus.
Search patents in B31B- Granted patents
- 2,795
- Published applications
- 2,290
- Assignees
- 1,067
- Inventors
- 3,505
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 49 | 0 |
| 1977 | 44 | 0 |
| 1978 | 36 | 0 |
| 1979 | 19 | 0 |
| 1980 | 33 | 0 |
| 1981 | 56 | 0 |
| 1982 | 29 | 0 |
| 1983 | 35 | 0 |
| 1984 | 35 | 0 |
| 1985 | 54 | 0 |
| 1986 | 49 | 0 |
| 1987 | 64 | 0 |
| 1988 | 49 | 0 |
| 1989 | 71 | 0 |
| 1990 | 48 | 0 |
| 1991 | 63 | 0 |
| 1992 | 50 | 0 |
| 1993 | 43 | 0 |
| 1994 | 46 | 0 |
| 1995 | 41 | 0 |
| 1996 | 43 | 0 |
| 1997 | 48 | 0 |
| 1998 | 54 | 0 |
| 1999 | 79 | 0 |
| 2000 | 74 | 0 |
| 2001 | 72 | 38 |
| 2002 | 75 | 94 |
| 2003 | 89 | 98 |
| 2004 | 64 | 137 |
| 2005 | 62 | 98 |
| 2006 | 59 | 86 |
| 2007 | 50 | 83 |
| 2008 | 45 | 79 |
| 2009 | 31 | 71 |
| 2010 | 50 | 92 |
| 2011 | 31 | 111 |
| 2012 | 54 | 99 |
| 2013 | 58 | 93 |
| 2014 | 53 | 96 |
| 2015 | 60 | 96 |
| 2016 | 61 | 93 |
| 2017 | 63 | 108 |
| 2018 | 62 | 97 |
| 2019 | 61 | 81 |
| 2020 | 72 | 96 |
| 2021 | 75 | 87 |
| 2022 | 74 | 76 |
| 2023 | 66 | 99 |
| 2024 | 95 | 89 |
| 2025 | 68 | 54 |
| 2026 | 33 | 39 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B31B 70/74Auxiliary operations1,758
- B31B 70/60Uniting opposed surfaces or edges654
- B31B 70/14Cutting459
- B31B 70/26Folding sheets, blanks or webs455
- B31B 70/02Feeding or positioning sheets, blanks or webs308
- B31B 70/006Controlling165
- B31B 70/008Stiffening or reinforcing133
- B31B 70/005Involving a particular layout of the machinery or relative arrangement of its71
Recent patents
- Method and machine for manufacturing a flexible envelope-like bag, particularly with reinforcement29 Sep 2026US 12,747,068 B2Holweg Group
- Easy open plastic bags22 Sep 2026US 12,741,786 B2Polytex Fibers Corporation
- Insulated box22 Sep 2026US 12,741,800 B2Pratt Retail Specialties, LLC
- Insulated box22 Sep 2026US 12,741,801 B2Pratt Retail Specialties, LLC
- All-in-one machine for folding and boxing fresh-keeping bags1 Sep 2026US 12,722,353 B2
- Machine and method for forming bags of flexible material24 Sep 2026US 2026/0284999 A1Ilapak Italia S.P.A.
- Method for manufacturing a container and manufacturing device24 Sep 2026US 2026/0285000 A1Mondi AG
- Resealable bag enclosure with scalloped tabs24 Sep 2026US 2026/0285545 A1Illinois Tool Works Inc.
- Packaging web material, packaging pouch and process for forming a packaging pouch24 Sep 2026US 2026/0286615 A1Mondi AG
- Rotary apparatus for sealing a continuous web and related method17 Sep 2026US 2026/0272725 A1GDM S.p. A.
Most cited
By later US patents
- Method and apparatus for manufacturing sleeve- or bag-like containers, as well as such container435US 5,228,234 AKlerk's Plastic Industrie, B.V. · 1993
- Vented pouch arrangement and method229US 5,059,036 AKapak Corporation · 1991
- Reclosable bag material, method and apparatus228US 4,909,017 AMinigrip, Inc. · 1990
- Reclosable bag, material, and method of and means for making same223US 4,617,683 AMinigrip, Inc. · 1986
- Tubular plastic end stops bonded to plastic zipper218US 5,482,375 AMobil Oil Corporation · 1996