Patent US3610499A successfully refreshed from Google Patents.
US3610499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper-feeding mechanism for photographic printers
Assignee: Pako Corp
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Filing: 1969-06-06
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Granted: 1971-10-05
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Expires: 1989-06-06
Abstract
Abstract This is an invention which permits precise feeding of a readily adjustable predetermined length of paper progressively in a stepby-step intermittent manner through a photographic printer. This is accomplished by a precisely variable length actuating arm intermittently rotatable through a predetermined constant arc (such as one complete revolution) and connected to a paperfeeding roll assembly for intermittent feeding of the paper through the printer.
Inventors
- 👤 Albert F Gallistel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:43
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/587
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
167 words
In a photographic printer of the type having paper supply mechanism and a takeup mechanism with an exposure area receiving photographic printing paper to be exposed; an adjustable paper-feeding mechanism comprising a pair of feeding rollers having driving engagement with said paper, a driving mechanism including an actuating arm having positive driving connection with at least one of said feeding rollers, power means for rotating said arm through a predetermined arc, means for precisely varying the effective length of said actuating arm to controllably vary the amount of rotation of said feeding rollers produced by said arm when the same is rotated through said predetermined arc to precisely control the length of paper fed into the exposure area by said feeding rollers, means for maintaining the desired predetermined tension in said paper while the same is in said exposure area, and a short feed mechanism connected with said feeding rollers for rotating the same through an arc substantially less than the arc produced by said actuating arm.
Claim 2
Dependent Claim
167 words
In a photographic printer of the type having paper supply mechanism and a takeup mechanism with an exposure area receiving photographic printing paper to be exposed; an adjustable paper-feeding mechanism comprising a pair of feeding rollers having driving engagement with said paper, a driving mechanism including an actuating arm having positive driving connection with at least one of said feeding rollers, power means for rotating said arm through a predetermined arc, means for precisely varying the effective length of said actuating arm to controllably vary the amount of rotation of said feeding rollers produced by said arm when the same is rotated through said predetermined arc to precisely control the length of paper fed into the exposure area by said feeding rollers, means for maintaining the desired predetermined tension in said paper while the same is in said exposure area, and a short feed mechanism connected with said feeding rollers for rotating the same through an arc substantially less than the arc produced by said actuating arm.
Claim 3
Dependent Claim
193 words
In a photographic printer of the type having paper supply mechanism and a takeup mechanism with an exposure area receiving photographic printing paper to be exposed; an adjustable paper-feeding mechanism comprising a pair of feeding rollers having driving engagement with said paper, a driving mechanism including an actuating arm having positive-driving connection with at least one of said feeding rollers, power means for rotating said arm through a predetermined arc, means for precisely varying the effective length of said actuating arm to controllably vary the amount of rotation of said feeding rollers produced by said arm when the same is rotated through said predetermined arc to precisely control the length of paper fed into the exposure area by said feeding rollers, means for maintaining the desired predetermined tension in said paper while the same is in said exposure area, and said tension-maintaining means consisting in a pair of tensioning rollers of slightly greater diameter than said feeding rollers and disposed on the opposite side of said exposure area from said feeding rollers and also having positive-driving connection with said arm and said paper to produce the same rotational speed as said feeding rollers.
Claim 4
Dependent Claim
193 words
In a photographic printer of the type having paper supply mechanism and a takeup mechanism with an exposure area receiving photographic printing paper to be exposed; an adjustable paper-feeding mechanism comprising a pair of feeding rollers having driving engagement with said paper, a driving mechanism including an actuating arm having positive-driving connection with at least one of said feeding rollers, power means for rotating said arm through a predetermined arc, means for precisely varying the effective length of said actuating arm to controllably vary the amount of rotation of said feeding rollers produced by said arm when the same is rotated through said predetermined arc to precisely control the length of paper fed into the exposure area by said feeding rollers, means for maintaining the desired predetermined tension in said paper while the same is in said exposure area, and said tension-maintaining means consisting in a pair of tensioning rollers of slightly greater diameter than said feeding rollers and disposed on the opposite side of said exposure area from said feeding rollers and also having positive-driving connection with said arm and said paper to produce the same rotational speed as said feeding rollers.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |