Claims
- 1. A web slitter for cutting a moving web of material comprising:
- (a) a carriage having a blade mounted thereon, said carriage including reciprocating means for lowering and raising said blade into and out of a cutting position;
- (b) braking means for releasably locking said carriage to a transverse support member to hold said carriage in a predetermined location;
- (c) actuating means for powering said reciprocating means and for locking and unlocking said braking means; and
- (d) selectable control means having a plurality of control modes for controlling said actuating means whereby said braking means may be locked without moving said reciprocating means when said control means is in a first control mode and whereby said reciprocating means may be moved without locking said braking means when said control means is in a second control mode.
- 2. The web slitter of claim 1 wherein said braking means and said reciprocating means are both actuated when said control means is in a third control mode.
- 3. The web slitter of claim 2 wherein said actuating means comprises a source of pneumatic pressure.
- 4. The web slitter of claim 3 wherein said control means comprises a plurality of simultaneously selectable valve pairs coupling said source of pneumatic pressure to said reciprocating means and to said braking means respectively, wherein each valve pair provides said first, second or third control modes.
Parent Case Info
This application is a continuation of application Ser. No. 07/414,525, filed Sept. 29, 1989, now abandoned, which is a divisional of copending application Ser. No. 07/293,298, filed on 1/3/89, now abandoned.
US Referenced Citations (14)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0113668 |
Jul 1984 |
EPX |
Non-Patent Literature Citations (1)
Entry |
"System Helios," Manufacturer Catalogue (Tidland Corporation, Camas WA., 8/86). |
Divisions (1)
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Number |
Date |
Country |
Parent |
293298 |
Jan 1989 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
414525 |
Sep 1989 |
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