B31F 1/284
Warp prevention
Official title: {Warp prevention}
B31F1/284 (Warp prevention) appears on 35 US grants and 25 published applications in this corpus.
Search patents in B31F- Granted patents
- 35
- Published applications
- 25
- Assignees
- 21
- Inventors
- 52
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 3 |
| 2009 | 0 | 0 |
| 2010 | 2 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 1 | 0 |
| 2020 | 1 | 1 |
| 2021 | 3 | 3 |
| 2022 | 1 | 1 |
| 2023 | 2 | 1 |
| 2024 | 0 | 2 |
| 2025 | 4 | 3 |
| 2026 | 1 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Warp detection in traveling corrugated product18 Aug 2026US 12,709,082 B2Intpro, LLC
- Warp detection and correction in traveling multi-layer product2 Dec 2025US 12,485,640 B2Intpro, LLC
- Plant and method for producing a corrugated board25 Nov 2025US 12,479,185 B2Fosber S.p.A.
- Paper-specific moisture control in a traveling paper web21 Oct 2025US 12,448,735 B2Intpro, LLC
- Warp detection in traveling corrugated product27 May 2025US 12,311,632 B2Intpro, LLC
- Detection device, sheet position adjustment device, and corrugate machine2 Jul 2026US 2026/0184035 A1Mitsubishi Heavy Industries Machinery Systems, Ltd.
- System and method for corrugated cardboard11 Jun 2026US 2026/0158761 A1
- Corrugated cardboard production unit and method for inspecting the flatness of corrugated cardboard sheets5 Mar 2026US 2026/0061721 A1
- Plant and method for producing a corrugated board26 Feb 2026US 2026/0054464 A1Fosber S.p.A.
- Paper-specific moisture control in a traveling paper web29 Jan 2026US 2026/0028779 A1Intpro, LLC
Most cited
By later US patents
- Process control system for corrugators70US 3,981,758 AKoppers Company, Inc. · 1976
- Method of and apparatus for controlling application of glue to defined areas44US 4,806,183 AConsolidated Papers, Inc. · 1989
- Method for controlling warp in the manufacture of corrugated paperboard37US 4,134,781 AKey Chemicals, Inc. · 1979
- Corrugated board manufacturing apparatus and process including precise web moisture and temperature control36US 5,244,518 AStickle Steam Specialties Co. Inc. · 1993
- Warp control apparatus and method for sheet material30US 5,049,216 AMeasurex Corporation · 1991