B31C
Making wound articles
Official title: Making wound articles, e.g. wound tubes, of paper, cardboard or material worked in a manner analogous to paper
B31C (Making wound articles) appears on 326 US grants and 256 published applications in this corpus.
Search patents in B31C- Granted patents
- 326
- Published applications
- 256
- Assignees
- 181
- Inventors
- 540
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 2 | 0 |
| 1978 | 10 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 12 | 0 |
| 1982 | 7 | 0 |
| 1983 | 7 | 0 |
| 1984 | 8 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 6 | 0 |
| 1988 | 6 | 0 |
| 1989 | 2 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 9 | 0 |
| 1994 | 5 | 0 |
| 1995 | 8 | 0 |
| 1996 | 9 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 12 | 0 |
| 2001 | 8 | 1 |
| 2002 | 6 | 4 |
| 2003 | 3 | 6 |
| 2004 | 4 | 16 |
| 2005 | 5 | 13 |
| 2006 | 3 | 9 |
| 2007 | 1 | 9 |
| 2008 | 4 | 9 |
| 2009 | 3 | 3 |
| 2010 | 5 | 10 |
| 2011 | 5 | 12 |
| 2012 | 5 | 7 |
| 2013 | 3 | 14 |
| 2014 | 6 | 16 |
| 2015 | 9 | 8 |
| 2016 | 10 | 7 |
| 2017 | 7 | 8 |
| 2018 | 5 | 10 |
| 2019 | 7 | 10 |
| 2020 | 9 | 12 |
| 2021 | 10 | 14 |
| 2022 | 11 | 14 |
| 2023 | 7 | 16 |
| 2024 | 15 | 12 |
| 2025 | 18 | 12 |
| 2026 | 6 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- B31C 3/00Making tubes or pipes by feeding obliquely to the winding mandrel centre168
- B31C 11/00Machinery for winding combined with other machinery74
- B31C 1/00Making tubes or pipes by feeding at right angles to the winding66
- B31C 7/00Making conical articles by winding27
- B31C 99/00Subject matter not provided for in other groups of this subclass25
- B31C 5/00Making tubes or pipes without using mandrels24
- B31C 9/00Simultaneous forming of cylindrical and conical shapes by winding separate webs5
Recent patents
- Void fill packaging product and methods for making11 Aug 2026US 12,703,555 B2Temperpack Technologies, Inc.
- Method for forming a body section of a paper cup and a paper sleeve23 Jun 2026US 12,661,862 B2Tokan Kogyo Co., Ltd.
- Container with product visualization aperture21 Apr 2026US 12,605,901 B2Sonoco Development, Inc.
- Cornet cone package production machine with vertical feeding14 Apr 2026US 12,600,106 B2
- Can27 Jan 2026US 12,534,263 B2Envican GmbH
- Paper supports for confectionery products and method fo preparation thereof13 Aug 2026US 2026/0234873 A1Perfetti Van Melle S.P.A.
- Apparatus for producing frustoconical barrel bodies made of paper and method9 Apr 2026US 2026/0097572 A1Imballaggi Invernizzi S.På.
- Corewinder To Form A Log Core, Process To Form Such A Core, And Tissue Paper Logs With Said Core19 Mar 2026US 2026/0077977 A1Gambini S.P.A.
- Ovality Resistance of a Spirally Wound Fiber Tube5 Feb 2026US 2026/0035204 A1Sonoco Development, Inc.
- Internal Spraying of Paper Product Cores20 Nov 2025US 2025/0354336 A1Kimberly-Clark Worldwide, Inc.
Most cited
By later US patents
- Filter element and manufacture method thereof183US 5,435,870 AIpics Corporation · 1995
- Filter element manufacturing method160US 5,543,007 ANippondenso Co., Ltd. · 1996
- Composite packaging material having an expanded sheet with a separator sheet104US 5,688,578 A1997
- Slit sheet packing material100US 5,667,871 AGeopax Ltd · 1997
- Core for core wound paper products having preferred seam construction77US 5,671,897 AThe Procter & Gamble Company · 1997