Bag-making-and-filling packaging apparatus

• US 4,754,593 A
• Filed: 08/05/1987
• Issued: 07/05/1988
• Est. Priority Date: 12/28/1985
• Status: Expired due to Term

• Current Assignee: Tokyo Automatic Machinery Works Ltd.
• Original Assignee: Tokyo Automatic Machinery Works Ltd.
• Inventors: Kanno, Nobuaki, Ishihara, Hisamitsu, Kobayashi, Hisafumi
• Primary Examiner(s): Coan, James F.
• Application Number:
  US07/081,549
• Time in Patent Office: 335 Days
• Field of Search: 53/51, 53/451, 53/493, 53/550, 53/551, 53/55, 53/66, 53/64, 493/24
• US Class Current: 53/51
• CPC Class Codes: B65B 41/18 Registering sheets, blanks, or webs
• CPC Class Codes: B65B 9/2028 Rollers or belts
• CPC Class Codes: B65B 9/213 the web having intermittent motion B65B9/22 takes precedence

Abstract

This disclosure relates to an improvement of a bag-making-and-filling packaging apparatus in which a web supplied from a roll of packaging material is formed into a tube through a tube-forming member and intermittently delivered and the formed tube is filled with a material to be packaged and when the filling is completed, the tube is sealed along the width thereof. The apparatus comprises an improved packaging material delivery device which is effective to assure durability of delivery means and to prevent damage to the packaging material for good packaging finish as well as to increase precision of delivery of the packaging material, and an improved registering device in which setting and adjusting operation of registering is facilitated and the structure associated with a register mark sensor is simplified.

Claims

1. A bag-making-and-filling apparatus in which a web supplied from a roll of packaging material is formed into a tube through a tube-forming member and intermittently delivered and the formed tube is filled with a material to be packaged when the filling is completed, the tube is sealed along the width thereof, comprising web delivery means disposed on a web-travelling path downstream of the forming member and measuring means disposed upstream of the delivery means and in direct contract with the web so as to be able to measure the actual run length of the web, said means for measuring the run length of the web being a non-driven rotary encoder and being rotatable in both forward and reverse directions at a speed corresponding to the speed of the web, said measuring means providing signals to a control system including a computer, said delivery means having a driving member which is started and stopped by said control system after a predetermined length of the web travel, said control system including a time lag sequence such that a predetermined length of the web is delivered after a counter is reset at zero by means of said time lag sequence and the counter begins to count in response to the direction of travel of the web;

the counter of the control system counting plus pulse at the forward rotation of the encoder and minus pulse at reverse rotation of the encoder.

2. The apparatus as defined in claim 1, wherein said delivery means includes a pair of delivery belts disposed on the opposite sides of the outer periphery of a bag-making cylindrical member, said delivery belts having driving shafts connected through a clutch and brake to a motor, and said measuring means upstream of the forming member and connected through a control system to said clutch and brake, start and stop of said delivery belts being controlled by said control system.

3. The apparatus as defined in claim 2, wherein said control system comprises a ROM in which predetermined fixed date and control data such as programs are written, a RAM in which input data from said encoder is written, and a backup RAM for storing set data such as pulse count for determining delivery length of the web.

4. The apparatus as defined in claim 1, wherein the web has register marks thereon at regular intervals and said apparatus further comprises a register mark sensor disposed upstream of the tube-forming member and adapted for detecting the register marks, said register mark sensor and said measuring means being connected through a control system to the driving member of said delivery means, said control system including an offset counter for counting measurement value of said measuring means and input means for inputting a set value and having an offset sequence which actuates the offset counter when said sensor detects a register mark, the driving member of said delivery means being stopped when the measurement value of said counter comes up to the set value.

5. The apparatus as defined in claim 4, wherein said control system further includes register mark decision means for inhibiting operation of the offset sequence when said sensor detects a previously detected register mark.

6. The apparatus as defined in claim 4, wherein said delivery means includes a pair of delivery belts disposed on the opposite sides of a bag-making cylindrical member, said delivery belts having driving shafts connected through a clutch and a brake to a motor, and said measuring means includes a rotary encoder rotatable in the forward and reverse directions.

7. The apparatus as defined in claim 6, wherein said control system comprises a ROM in which fixed data such as decision value for deciding whether or not the register mark is valid and control data such as programs are written, a RAM which receives output signals from said encoder and said register mark sensor and has a function of counting pulse signals transmitted from said encoder, and a backup RAM for storing set values such as offset value to determine the run length of the web after a register mark is detected.

8. The apparatus as defined in claim 7, wherein the counter function of said RAM of the control system is executed by a reversible register mark decision counter whose count is added to the decision value of ROM at forward rotation of said encoder and is substracted therefrom at its reverse rotation, an offset counter which is incremented at forward rotation of said encoder in the offset sequence after a register mark is detected, and a time lag counter which is incremented at forward rotation of said encoder in a time lag sequence after the count of said time lag counter comes to the offset value.

9. The apparatus as defined in claim 8, wherein said offset counter includes two units which operate alternately.