US3847045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web perforating apparatus
Assignee: Individual
•
Filing: 1973-05-25
•
Granted: 1974-11-12
•
Expires: 1993-05-25
Abstract
Abstract Apparatus for continuously cutting side-by-side rectangular perforated areas in a web of paper or nonwoven material. The apparatus includes spaced machine direction perforator wheels with coacting anvil wheels, a cammed slitter to cut short slits in the machine direction in the corner areas of the eventual rectangular perforated area and a transverse perforator including flexible rotating knives and a stationary anvil blade for cutting transverse perforations which outline the side-by-side rectangular perforated areas. The apparatus is preferably used for cutting perforated areas in a web which will later be converted into individual diaper topsheets, each of which has a perforated removable area. The perforations are in the form of short cuts, but the corners are preferably formed with elongated slits in order to facilitate removal and separation in the ultimate product.
Inventors
- 👤 W Willhite
- 👤 H Strube
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:04
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/18; B26D; B26D1/00; B26D1/01; B26D1/12; B26D1/14; B26D1/20; B26D1/205; B26D1/25; B26D1/34; B26D1/38; B26D1/385; B26D7/00; B26D7/20; B26D9/00; C; C14; C14B; C14B5/00; C14B2700/00; C14B2700/11; C14B2700/116; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0515; Y10T83/0524; Y10T83/0572; Y10T83/465; Y10T83/4696; Y10T83/4766; Y10T83/4795; Y10T83/4798; Y10T83/4847; Y10T83/647; Y10T83/6476; Y10T83/869; Y10T83/8752; Y10T83/929; Y10T83/9372; Y10T83/9408
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
101 words
A web perforating apparatus comprising: a. means for continuously supporting a web moving through said apparatus, b. means for forming continuous spaced lines of longitudinal perforations along opposite edges of said web, c. means for forming an elongated longitudinal slit at predetermined intervals coextensive with at least one of said lines of longitudinal perforations, and, d. means for forming transverse perforations at spaced intervals on said web, said transverse perforations extending between said longitudinal perforations and having an elongated transverse slit whereby a succession of substantially rectangular side-by-side perforated areas are formed on said web having at least one slitted corner.
Claim 2
Dependent Claim
101 words
A web perforating apparatus comprising: a. means for continuously supporting a web moving through said apparatus, b. means for forming continuous spaced lines of longitudinal perforations along opposite edges of said web, c. means for forming an elongated longitudinal slit at predetermined intervals coextensive with at least one of said lines of longitudinal perforations, and, d. means for forming transverse perforations at spaced intervals on said web, said transverse perforations extending between said longitudinal perforations and having an elongated transverse slit whereby a succession of substantially rectangular side-by-side perforated areas are formed on said web having at least one slitted corner.
Claim 3
Dependent Claim
98 words
A web perforating apparatus as claimed in claim 1 wherein said means for forming continuous spaced lines of longitudinal perforations comprises a pair of continuously rotated spaced anvil wheels, said perforator wheels being biased toward said anvil wheels. 3. A web perforating apparatus as claimed in claim 1 wherein said means for forming transverse perforations comprises a rotating knife roll having a flexible perforating blade extending therefrom, an anvil block supporting a flexible stationary perforating blade, said blades coacting on rotation of said knife roll to cut said transverse perforations in said web extending between the longitudinal perforations.
Claim 4
Dependent Claim
87 words
A web perforating apparatus as claimed in claim 1 wherein said means for forming an elongated longitudinal slit comprises a deadplate for supporting said web and having at least one opening therein, a continuously rotating slitter wheel mounted beneath each opening of said deadplate, a rotating member above said slitter wheel, said rotating member having a lobe with a slot at its distal end extending radially therefrom, said lobe periodically pressing said web through said opening in said deadplate, causing it to momentarily contact said slitter wheel.
Claim 5
Dependent Claim
59 words
A web perforating apparatus as claimed in claim 2 wherein said means for forming transverse perforations comprises a rotating knife roll having a flexible perforating blade blade, therefrom, an anvil block supporting a flexible stationary perforating balde, said blades coacting on rotation of said knife roll to cut said transverse perforations in said web extending between the longitudinal perforations.
Claim 6
Dependent Claim
87 words
A web perforating apparatus as claimed in claim 2 wherein said means for forming an elongated longitudinal slit comprises a deadplate for supporting said web and having at least one opening therein, a continuously rotating slitter wheel mounted beneath each opening of said deadplate, a rotating member above said slitter wheel, said rotating member having a lobe with a slot at its distal end extending radially therefrom, said lobe periodically pressing said web through said opening in said deadplate causing it to momentarily contact said slitter wheel.
Claim 7
Dependent Claim
87 words
A web perforating apparatus as claimed in claim 3 wherein said means for forming an elongated longitudinal slit comprises a deadplate for supporting said web and having at least one opening therein, a continuously rotating slitter wheel mounted beneath each opening of said deadplate, a rotating member above said slitter wheel, said rotating member having a lobe with a slot at its distal end extending radially therefrom, said lobe periodically pressing said web through said opening in said deadplate causing it to momentarily contact said slitter wheel.
Claim 8
Dependent Claim
87 words
A web perforating apparatus as claimed in claim 5 wherein said means for forming an elongated longitudinal slit comprises a deadplate for supporting said web and having at least one opening therein, a continuously rotating slitter wheel mounted beneath each opening of said deadplate, a rotating member above said slitter wheel, said rotating member having a lobe with a slot at its distal end extending radially therefrom, said lobe periodically pressing said web through said opening in said deadplate causing it to momentarily contact said slitter wheel.
Claim 9
Independent Claim
138 words
A method of perforating a web comprising the steps of: a. supporting and moving a web, b. forming continuous single lines of longitudinal perforations in substantial spaced-apart relationship along opposite edges of said web, c. forming an elongated longitudinal slit at predetermined intervals coextensive with at least one of said lines of longitudinal perforations, forming said longitudinal slit such that it is substantially greater in length than each individual perforation, and d. forming transverse perforations at spaced intervals on said web, said transverse perforations extending between said longitudinal perforations and having an elongated transverse slit intersecting each elongated longitudinal slit, forming said elongated transverse slit such that it is substantially greater in length than each individual transverse perforation whereby a succession of substantially rectangular side-by-side perforated areas are formed on said web having at least one slitted corner.
Claim 10
Independent Claim
138 words
A method of perforating a web comprising the steps of: a. supporting and moving a web, b. forming continuous single lines of longitudinal perforations in substantial spaced-apart relationship along opposite edges of said web, c. forming an elongated longitudinal slit at predetermined intervals coextensive with at least one of said lines of longitudinal perforations, forming said longitudinal slit such that it is substantially greater in length than each individual perforation, and d. forming transverse perforations at spaced intervals on said web, said transverse perforations extending between said longitudinal perforations and having an elongated transverse slit intersecting each elongated longitudinal slit, forming said elongated transverse slit such that it is substantially greater in length than each individual transverse perforation whereby a succession of substantially rectangular side-by-side perforated areas are formed on said web having at least one slitted corner.
Claim 11
Dependent Claim
54 words
A method of perforating a web as claimed in claim 9 wherein the step of forming transverse perforations at spaced intervals comprises moving the web between oppositely disposed flexing knife blades, and rotating one of said knife blades on a supporting knife roll while supporting said other knife blade in a stationary anvil block.
Claim 12
Independent Claim
126 words
A method of perforating a web comprising the steps of: a. supporting and moving a web, b. forming continuous spaced lines of longitudinal perforations along opposite edges of said web, c. forming an elongated longitudinal slit at predetermined intervals coextensive with at least one of said lines of longitudinal perforations by periodically pushing said web through an opening in its supporting surface and momentarily contacting said web against a rotating slitter wheel located beneath said opening, and d. forming transverse perforations at spaced intervals on said web, said transverse perforations extending between said longitudinal perforations and having an elongated transverse slit intersecting each elongated longitudinal slit whereby a succession of substantially rectangular side-by-side perforated areas are formed on said web having at least one slitted corner.
Claim 13
Independent Claim
126 words
A method of perforating a web comprising the steps of: a. supporting and moving a web, b. forming continuous spaced lines of longitudinal perforations along opposite edges of said web, c. forming an elongated longitudinal slit at predetermined intervals coextensive with at least one of said lines of longitudinal perforations by periodically pushing said web through an opening in its supporting surface and momentarily contacting said web against a rotating slitter wheel located beneath said opening, and d. forming transverse perforations at spaced intervals on said web, said transverse perforations extending between said longitudinal perforations and having an elongated transverse slit intersecting each elongated longitudinal slit whereby a succession of substantially rectangular side-by-side perforated areas are formed on said web having at least one slitted corner.
Claim 14
Independent Claim
158 words
A method of perforating a web comprising the steps of: a. supporting and moving a web, b. forming continuous spaced lines of longitudinal perforations along opposite edges of said web, c. forming an elongated longitudinal slit at predetermined intervals coextensive with at least one of said lines of longitudinal perforations by periodically pushing said web through an opening in its supporting surface and momentarily contacting said web against a rotating slitter wheel located beneath said opening, and d. forming transverse perforations at spaced intervals on said web by moving the web between oppositely disposed flexing knife blades, rotating one of said knife blades on a supporting knife roLl while supporting said other knife blade in a stationary anvil block, said transverse perforations extending between said longitudinal perforations and having an elongated transverse slit intersecting each elongated longitudinal slit whereby a succession of substantially rectangular side-by-side perforated areas are formed on said web having at least one slitted corner.
Claim 15
Independent Claim
158 words
A method of perforating a web comprising the steps of: a. supporting and moving a web, b. forming continuous spaced lines of longitudinal perforations along opposite edges of said web, c. forming an elongated longitudinal slit at predetermined intervals coextensive with at least one of said lines of longitudinal perforations by periodically pushing said web through an opening in its supporting surface and momentarily contacting said web against a rotating slitter wheel located beneath said opening, and d. forming transverse perforations at spaced intervals on said web by moving the web between oppositely disposed flexing knife blades, rotating one of said knife blades on a supporting knife roLl while supporting said other knife blade in a stationary anvil block, said transverse perforations extending between said longitudinal perforations and having an elongated transverse slit intersecting each elongated longitudinal slit whereby a succession of substantially rectangular side-by-side perforated areas are formed on said web having at least one slitted corner.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |