Patent US4551374A successfully refreshed from Google Patents.
US4551374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous sheet with perforated tear-off driving edge and recessed reinforced inner edge
Assignee: Holmberg Co
•
Filing: 1984-06-20
•
Granted: 1985-11-05
•
Expires: 2004-06-20
Abstract
Abstract An improved continuous sheet having tear-off perforated edge portions for use with toothed driving wheels (tractor drive transfer mechanism) adapted to mesh with the perforations to advance the continuous sheet in accordance with word processing and printing equipment, said sheet having a recessed, reinforced inner edge portion adjacent to the tear-off line of the perforated edge portion.
Inventors
- 👤 Thomas A. Holmberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:28
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/34; Y; Y10; Y10T; Y10T428/00; Y10T428/15; Y10T428/22; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24777; Y10T428/24793
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
A continuous sheet having a plurality of drive perforations formed along at least one edge portion thereof, the perforated driving edge portion of said continuous sheet having a tear line to permit removal of the perforated edge portion, a reinforcing strip permanently adhered to said sheet along the tear line on the opposite side of the tear line from the perforated driving edge portion, said strip being recessed into the edge portion of the sheet so that the thickness of said sheet reinforced by said strip is no greater than the full thickness of the remaining portion of the sheet to produce substantially uniform sheet thickness across the entire width of the continuous sheet before and after removal of the perforated edge portion.
Claim 2
Dependent Claim
123 words
A continuous sheet having a plurality of drive perforations formed along at least one edge portion thereof, the perforated driving edge portion of said continuous sheet having a tear line to permit removal of the perforated edge portion, a reinforcing strip permanently adhered to said sheet along the tear line on the opposite side of the tear line from the perforated driving edge portion, said strip being recessed into the edge portion of the sheet so that the thickness of said sheet reinforced by said strip is no greater than the full thickness of the remaining portion of the sheet to produce substantially uniform sheet thickness across the entire width of the continuous sheet before and after removal of the perforated edge portion.
Claim 3
Dependent Claim
31 words
The structure set forth in claim 1 and both edges of said sheet having perforated edge portions therealong, each with a tear line to permit removal of the perforated edge portions.
References Cited (Backward Citations)
US3322441A
Cited
US4447481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-04 | 1989-05-06 | 1989-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-04 | 1993-05-06 | 1993-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-04 | 1997-05-06 | 1997-11-05 | $7700.00 | Window Closed / Lapsed |