B31F 1/28
Combined with uniting the corrugated webs to flat webs
Official title: combined with uniting the corrugated webs to flat webs {; Making double-faced corrugated cardboard}
B31F1/28 (Combined with uniting the corrugated webs to flat webs) appears on 645 US grants and 426 published applications in this corpus.
Search patents in B31F- Granted patents
- 645
- Published applications
- 426
- Assignees
- 251
- Inventors
- 826
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 12 | 0 |
| 1978 | 13 | 0 |
| 1979 | 8 | 0 |
| 1980 | 7 | 0 |
| 1981 | 16 | 0 |
| 1982 | 16 | 0 |
| 1983 | 8 | 0 |
| 1984 | 10 | 0 |
| 1985 | 16 | 0 |
| 1986 | 20 | 0 |
| 1987 | 14 | 0 |
| 1988 | 10 | 0 |
| 1989 | 9 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 17 | 0 |
| 1993 | 11 | 0 |
| 1994 | 14 | 0 |
| 1995 | 12 | 0 |
| 1996 | 15 | 0 |
| 1997 | 24 | 0 |
| 1998 | 24 | 0 |
| 1999 | 25 | 0 |
| 2000 | 27 | 0 |
| 2001 | 13 | 4 |
| 2002 | 9 | 16 |
| 2003 | 12 | 14 |
| 2004 | 10 | 18 |
| 2005 | 5 | 10 |
| 2006 | 1 | 10 |
| 2007 | 7 | 12 |
| 2008 | 7 | 16 |
| 2009 | 3 | 9 |
| 2010 | 9 | 12 |
| 2011 | 8 | 24 |
| 2012 | 7 | 10 |
| 2013 | 12 | 15 |
| 2014 | 10 | 16 |
| 2015 | 8 | 29 |
| 2016 | 11 | 10 |
| 2017 | 15 | 20 |
| 2018 | 9 | 22 |
| 2019 | 13 | 30 |
| 2020 | 18 | 20 |
| 2021 | 25 | 23 |
| 2022 | 23 | 20 |
| 2023 | 13 | 15 |
| 2024 | 18 | 20 |
| 2025 | 15 | 17 |
| 2026 | 9 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B31F 1/2845Details336
- B31F 1/2831Control151
- B31F 1/2818Glue application specially adapted therefor112
- B31F 1/2804Methods76
- B31F 1/2813Making corrugated cardboard of composite structure73
- B31F 1/2822Involving additional operations68
- B31F 1/2895From corrugated webs having corrugations of particular shape22
- B31F 1/2886Additionally reinforcing19
All 9 subgroupsShow fewer
Recent patents
- Method for operating a system having a corrugator and a printing machine, and system6 Oct 2026US 12,752,550 B2BHS Corrugated Maschinen-und Anlagenbau GmbH
- Plant and method for manufacturing corrugated board with an order change detector8 Sep 2026US 12,728,615 B2Fosber S.p.A.
- Warp detection in traveling corrugated product18 Aug 2026US 12,709,082 B2Intpro, LLC
- Device for detecting paper splice part of cardboard sheet, and device for producing cardboard sheet31 Mar 2026US 12,589,572 B2Mitsubishi Heavy Industries Machinery Systems, Ltd.
- Device and method for replacing stage roll unit10 Mar 2026US 12,570,069 B2Mitsubishi Heavy Industriesmachinery Systems, Ltd
- Arrangement and method10 Sep 2026US 2026/0264360 A1BHS Corrugated Maschinen-und Anlagenbau GmbH
- Corrugated cardboard and a method for producing a corrugated cardboard20 Aug 2026US 2026/0243022 A1Jml Innovation AB
- Printing assembly, printing method and material web16 Jul 2026US 2026/0200197 A1BHS Corrugated Maschinen-und Anlagenbau GmbH
- Detection device, sheet position adjustment device, and corrugate machine2 Jul 2026US 2026/0184035 A1Mitsubishi Heavy Industries Machinery Systems, Ltd.
- Method for operating a corrugator, and corrugator25 Jun 2026US 2026/0178242 A1BHS Corrugated Maschinen-und Anlagenbau GmbH
Most cited
By later US patents
- Method for making a sheet of loop material185US 5,256,231 AMinnesota Mining and Manufacturing Company · 1993
- Coated abrasive sheet material with loop material for attachment incorporated therein109US 5,254,194 AMinnesota Mining and Manufacturing Company · 1993
- Repulpable corrugated box with styrene-acrylic copolymer and hydrogenated triglyceride coating95US 9,701,437 B2Indevco Plastics, Inc. · 2017
- Laminated moisture resistant poultry box and process94US 10,226,909 B2Indevco Plastics, Inc. · 2019
- RFID enabled corrugated structures84US 6,667,092 B1International Paper Company · 2003