US3874576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing machine
Assignee: Individual
•
Filing: 1973-09-10
•
Granted: 1975-04-01
•
Expires: 1993-09-10
Abstract
Abstract A machine for imprinting on a strip or sheet comprises multiple printing cylinders in tandem and revolving continuously at the same speeds for imprinting successive impressions on the strip. The strip is intermittently fed at a linear speed that is the same as the peripheral speed of the impression surfaces of the printing plates on the printing cylinders. The mechanism for intermittent feed comprises a carrier having spring fingers that engage notches at the sides of the strip to feed the strip a predetermined amount after which the carrier is returned to an initial or starting position for again feeding the strip.
Inventors
- 👤 George Ross Vines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:09
CPC Classifications
B; B41; B41F; B41F13/00; B41F13/02; B41F13/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
204 words
In a machine of the character described, means for advancing a sheet of material, a carrier having spring fingers for engaging notches at the sides of said sheet, means for moving said carrier forwardly from an initial position through a predetermined distance to advance said sheet said predetermined distance, means for retracting said carrier to said initial position, said carrier-moving means including a rotatable member, a flexible structure trained over said rotatable member and connected to said carrier, means for rotating said rotatable member an amount sufficient to advance said carrier said predetermined distance and sAid means for retracting said carrier comprising means engaging said carrier and operable to rotate said member in the opposite direction an amount sufficient to retract said carrier to said initial position, means for applying retrograde force to said sheet when said carrier has advanced said predetermined distance, said means for applying retrograde force being inoperative on said sheet when the carrier is moving forwardly, and means including another spring finger engaging said notches and cooperating with said means for applying the retrograde force for engaging said sheet in a manner to locate said sheet in a predetermined position of registry preparatory to the next advance of the sheet.
Claim 2
Dependent Claim
204 words
In a machine of the character described, means for advancing a sheet of material, a carrier having spring fingers for engaging notches at the sides of said sheet, means for moving said carrier forwardly from an initial position through a predetermined distance to advance said sheet said predetermined distance, means for retracting said carrier to said initial position, said carrier-moving means including a rotatable member, a flexible structure trained over said rotatable member and connected to said carrier, means for rotating said rotatable member an amount sufficient to advance said carrier said predetermined distance and sAid means for retracting said carrier comprising means engaging said carrier and operable to rotate said member in the opposite direction an amount sufficient to retract said carrier to said initial position, means for applying retrograde force to said sheet when said carrier has advanced said predetermined distance, said means for applying retrograde force being inoperative on said sheet when the carrier is moving forwardly, and means including another spring finger engaging said notches and cooperating with said means for applying the retrograde force for engaging said sheet in a manner to locate said sheet in a predetermined position of registry preparatory to the next advance of the sheet.
Claim 3
Dependent Claim
165 words
In a machine of the character described, means for advancing a sheet of material, a carrier for engaging said sheet, guide members on opposite sides of said sheet for slidably supporting said carrier, said carrier having opposed blocks on opposite sides of the sheet and said blocks having spring finger means resiliently biased toward the sheet for engagement therewith, means for advancing said carrier to advance said sheet to a position of registry, means for retracting said carrier independently of said sheet, and means for preventing misregistry of said sheet upon retraction of said carrier, said last-mentioned means including a block having a spring finger for engagement with said sheet, roller means engaging the surface of said sheet, and motor means for driving said roller means, the rotation of said roller means applying a retrograde force on said sheet, said roller means being freely rotatable upon advancement of said sheet and being driven by said motor means upon completion of the advance of said sheet.
Claim 4
Dependent Claim
165 words
In a machine of the character described, means for advancing a sheet of material, a carrier for engaging said sheet, guide members on opposite sides of said sheet for slidably supporting said carrier, said carrier having opposed blocks on opposite sides of the sheet and said blocks having spring finger means resiliently biased toward the sheet for engagement therewith, means for advancing said carrier to advance said sheet to a position of registry, means for retracting said carrier independently of said sheet, and means for preventing misregistry of said sheet upon retraction of said carrier, said last-mentioned means including a block having a spring finger for engagement with said sheet, roller means engaging the surface of said sheet, and motor means for driving said roller means, the rotation of said roller means applying a retrograde force on said sheet, said roller means being freely rotatable upon advancement of said sheet and being driven by said motor means upon completion of the advance of said sheet.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |