APPARATUS FOR PAPER SACKS MANUFACTURE

• US 3,580,141 A
• Filed: 08/21/1968
• Issued: 05/25/1971
• Est. Priority Date: 08/28/1967
• Status: Expired due to Term

• Current Assignee: Herbert Richter
• Original Assignee: Herbert Richter
• Inventors: Richter, Herbert
• Application Number:
  US04/754,247
• Time in Patent Office: 1,007 Days
• US Class Current: 493/27
• CPC Class Codes: B31B 2150/00 Flexible containers made from sheets or blanks, e.g. from flattened tubes
• CPC Class Codes: B31B 2150/003 made from tubular sheets
• CPC Class Codes: B31B 50/626 Arrangements for permitting the glue to set
• CPC Class Codes: B31B 70/022 Holders for feeding or positioning sheets or webs
• CPC Class Codes: B31B 70/04 Feeding sheets or blanks
• CPC Class Codes: B31B 70/62 by adhesives
• CPC Class Codes: B65G 47/5181 using stacking or destacking arrangements or stacks of articles or article-carriers
• CPC Class Codes: B65G 47/647 the axis being perpendicular to the conveying direction
• CPC Class Codes: B65H 29/16 by contact of one face only with moving tapes, bands, or chains with suction belts B65H29/242
• CPC Class Codes: B65H 29/60 diverting the stream into alternative paths B65H29/62 takes precedence
• CPC Class Codes: B65H 43/08 Photoelectric devices

Abstract

A system of multiple conveyor belts designed to maintain a balance between the output of a tube-forming machine and a bottom-folding machine used in the manufacture of paper, plastic or similar sacks, in which an assemblage of conveyor belts having sufficient capacity for the piles of tubes produced by the tubeformer acts as a magazine upon which the bottom-folder draws as required. Pivoting conveyor belts, directed by suitable monitoring devices, maintain a steady flow into and out of the magazine.

Claims

1. In an apparatus for the production of sacks having a tubeformer, at least one bottom-folder provided with a number or feeding stations and a conveyor arrangement interposed between the tube-former and the bottom-folder for conveying piles of tube sections delivered by the tube-former to the bottom-folder, said conveyor arrangement including a magazine having an entrance end and an exit end, said being adapted to store the piles and comprising a plurality of storing conveyors, the number of which is greater than the number of feeding stations of the bottomfolder, each of said storing conveyors being provided with sensing means determining the occupation situation of the storing conveyors, at least one feed-in conveyor arranged at the entrance end of the magazine and pivotable so as to selectively cooperate with one of the storing conveyors in dependence on the occupation situation thereof, and at least one feed-off conveyor arranged at the exit end of the magazine and pivotable so as to selectively cooperate with one of the storing conveyors in dependence on the occupation situation thereof.

2. The apparatus according to claim 1, characterized in that associated with the or each feed-in conveyor is a pressure belt.

3. The apparatus according to claim 1 in which said storing conveyors and said fEed-in and feed-off conveyors provide endless belts and in which at the transfer positions between said feed-in conveyors and said storing conveyors and/or between the latter and, said feed-off conveyors meshing groups of said belts are provided distanced from one another in the transverse direction.

4. The apparatus according to claim 1, characterized in that the movement of the storing conveyors is controllable by means of the sensing means.

5. The apparatus according to claim 1, characterized in that the pivoting movement of said feed-in conveyor and/or of said feed-off conveyor isle by means of the sensing means associated with the storing conveyors.