Patent US1703588A successfully refreshed from Google Patents.
Patent US3600997A successfully refreshed from Google Patents.
US3600997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for effecting severance of webs in response to changes in transparency along their length
Assignee: Rheinbraun AG
•
Filing: 1969-07-30
•
Granted: 1971-08-24
•
Expires: 1989-07-30
Abstract
Abstract In order to automatically cut to size nonuniformly spaced photographs arranged serially to constitute a continuous web, a cutting mechanism to sever the web transversally is operated upon sensing the change in the transparency of the web between a dark margin that frames each photograph and a light strip separating each margin from that of an adjacent photograph. There are provided a first photoelectric sensing station which generates a control signal to stop the web feed and effect cutting when the leading edge of a photograph coincides with the severing path of the cutting mechanism and a second photoelectric sensing station which generates a control signal to stop the web feed and effect cutting when the trailing edge of the same photograph coincides with said severing path.
Inventors
- 👤 Werner Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:42
CPC Classifications
B; B26; B26D; B26D5/00; B26D5/20; B26D5/30; B26D5/34; D; D06; D06H; D06H7/00; Y; Y10; Y10T; Y10T83/00; Y10T83/444; Y10T83/4458; Y10T83/446; Y10T83/525; Y10T83/531; Y10T83/533; Y10T83/541; Y10T83/543
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
222 words
An apparatus for actuating a cutting mechanism to effect, along a cutting path, a transversal severance of a web of indefinite length advanced in the longitudinal direction thereof, said web including along its length alternately repetitive adjacent fields of two types having two substantially differing values of transparency, the border line between two adjoining fields of said two types extending transversally of the length dimension of said web, said apparatus comprising, A. at least one sensing station including at least one first photocell and at least one second photocell; said first and said second photocells being disposed adjacent one face of said web and juxtaposed with respect to one another in the longitudinal direction of said web; said first and second photocells being spaced from said cutting path to such an extent in said longitudinal direction as to be located at different sides of said border line when the desired line of severance on said web coincides with said cutting path, and B. electronic circuit means adapted to receive transparencyresponsive signals from said sensing station and to actuate said cutting mechanism when a change of transparency is sensed, said electronic circuit means including a flip-flop circuit associated with each sensing station, each flip-flop circuit adapted to receive said signals and deliver two outputs corresponding to said two substantially differing values of transparency.
Claim 2
Independent Claim
222 words
An apparatus for actuating a cutting mechanism to effect, along a cutting path, a transversal severance of a web of indefinite length advanced in the longitudinal direction thereof, said web including along its length alternately repetitive adjacent fields of two types having two substantially differing values of transparency, the border line between two adjoining fields of said two types extending transversally of the length dimension of said web, said apparatus comprising, A. at least one sensing station including at least one first photocell and at least one second photocell; said first and said second photocells being disposed adjacent one face of said web and juxtaposed with respect to one another in the longitudinal direction of said web; said first and second photocells being spaced from said cutting path to such an extent in said longitudinal direction as to be located at different sides of said border line when the desired line of severance on said web coincides with said cutting path, and B. electronic circuit means adapted to receive transparencyresponsive signals from said sensing station and to actuate said cutting mechanism when a change of transparency is sensed, said electronic circuit means including a flip-flop circuit associated with each sensing station, each flip-flop circuit adapted to receive said signals and deliver two outputs corresponding to said two substantially differing values of transparency.
Claim 3
Dependent Claim
95 words
An apparatus as defined in claim 1, wherein a plurality of said first photocells forms a first group of photocells arranged in a juxtaposed series extending parallel to said cutting path and a plurality of said second photocells forms a second group of photocells arranged in a juxtaposed series extending parallel and immediately adjacent to the series of photocells of said first group, said first and second groups are located at different sides of said border line when the desired line of severance on said web coincides with said cutting path of said cutting mechanism.
Claim 4
Dependent Claim
158 words
An apparatus as defined in claim 1, wherein fields of one type have identical predetermined lengths in the longitudinal direction of said web, including A. a first sensing station disposed upstream of said cutting path at a distance therefrom corresponding to said predetermined length to sense a change from the transparency of one type of field to the transparency of the other type of field when a desired first line of severance on said web coincides with said cutting path, and B. a second sensing station disposed downstream of said cutting path at a distance therefrom corresponding to said predetermined length to sense the passage of the leading edge of said web when a desired second line of severance on said web coincides with said cutting path; said leading edge is formed by a cut coinciding with said first line of severance; the distance between the first and second lines of severance is identical to said predetermined length.
Claim 5
Dependent Claim
45 words
An apparatus as defined in claim 1, including an AND-gate to which the output of each of said flip-flop circuits is applied, the output voltage of said AND-gate is adapted to effect the interruption of the web feed and the actuation of said cutting mechanism.
Claim 6
Dependent Claim
99 words
An apparatus as defined in claim 3, including an AND-gate to which the output of at least one flip-flop circuit associated with said first sensing station is applied, the output of said AND-gate is coupled with the input of the flip-flop circuit associated with said second sensing station; the output of said AND-gate is also coupled with an input of an OR-gate, another input of the latter is connected to an output of the last-named flip-flop circuit; the output of said OR-gate is adapted to effect the interruption of the web feed and the actuation of said cutting mechanism.
Claim 7
Dependent Claim
54 words
An apparatus as defined in claim 5, wherein the output of said OR-gate is applied to an additional flip-flop circuit, one output of which is connected with a control means of a braking mechanism, the other output of which is connected with a control means associated with a conveying mechanism for the web feed.
Claim 8
Dependent Claim
35 words
An apparatus as defined in claim 6, wherein the output of said OR-gate is also applied to an additional AND-gate, the output of which is connected with a control means associated with said cutting mechanism.
Claim 9
Dependent Claim
62 words
An apparatus as defined in claim 7, wherein an input of said additional AND-gate is connected through a circuit breaker switch to that output of said additional flip-flop circuit which is connected to the control means of said braking mechanism; said circuit breaker switch is adapted to be closed by the last-named control means upon energization thereof by said additional flip-flop circuit.
References Cited (Backward Citations)
US3469480A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |