1. An optical apparatus comprising:
a light-quantity-adjusting unit;
a first lens unit disposed closer to an object than the light-quantity-adjusting unit;
a second lens unit disposed closer to an image plane than the light-quantity-adjusting unit;
a holding member holding the first lens unit and the second lens unit;
a drive unit driving the holding member in an orthogonal-to-an-optical-axis direction;
a base member movably supporting the holding member in an orthogonal-to-the-optical-axis direction; and
the holding member including:
a first holder holding the first lens unit;
a second holder holding the second lens unit;
a connector connecting the first holder and the second holder along an orthogonal-to-the-optical-axis direction;
the light-quantity-adjusting unit being inserted and disposed into a space defined by the first holder, the second holder, and the connector, from an orthogonal-to-the-optical-axis direction; and
the light-quantity-adjusting unit being fixed to the base member.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. In a method of making a reclosable bag, a method comprising:
feeding a zipper tape having at least one splotched portion past an optical sensor that optically detects opacity variations in said zipper tape;
optically detecting said splotched portion to produce a signal; and
actuating a cutter for cutting said zipper tape in response to said signal to create a selected portion of the zipper tape; and
sealing the selected portion of the zipper tape to a web.
2. The method of claim 1 wherein said step of optically detecting said splotched portion includes the step of optically detecting zipper strip opacity variations and said step of optically detecting comprises determining a thickness of said splotched portion by changes in the opacity of portions of said zipper strip.
3. The method of claim 2 in which said step of determining comprises comparing said thickness of said splotched portion to a reference predetermined thickness of the zipper tape.
4. The method of claim 1 further comprising splotching said zipper tape multiple times to create a series of splotches along the length of the zipper tape.
5. A method for sealing a portion of a zipper tape to a web, said zipper tape having a splotch along the length of the zipper tape, said splotch having a thickness less than the zipper tape thickness and, an opacity different than the zipper tape, the method comprising:
providing an elevator having a platform for receiving a portion of zipper tape;
depositing the portion of zipper tape onto the platform by feeding the zipper tape onto the platform and past an optical sensor that optically detects variations in the opacity of said zipper tape, until said optical sensor detects a splotched portion in the zipper tape being fed;
positioning a web section above the platform;
positioning a sealing head over the web section for heating the web section; and
elevating the platform towards the web section until the portion of zipper tape on the platform comes into contact with the web section, thereby forming a seal between the zipper tape and the web section.
6. The method of claim 5 wherein said sealing head is in contact with the web section when the portion of zipper tape on the platform comes into contact with the web section.
7. The method of claim 5 further comprising the step of perforating the web section.
8. The method of claim 7 wherein the web section is perforated by a knife positioned above the web section.
9. The method of claim 7 wherein the web section is perforated prior to the portion of zipper tape on the platform being sealed to the web section.
10. The method of claim 5 wherein the seal is substantially airtight.
11. The method of claim 5 wherein the seal is substantially watertight.
12. The method of claim 5 wherein the portion of zipper tape is created by feeding a zipper tape until a splotched portion crosses the optical sensor thereby detecting said splotched portion to obtain a signal from the optical sensor, and cutting said zipper tape in response to said signal to create the portion of zipper tape on the platform.
13. The method of claim 5 wherein the method is repeated to seal a plurality of zipper tapes to the web and further comprising the step of winding the resulting web onto a winder.