什(shen)么是(shi)裹(guo)背條(tiao)(tiao)，裹(guo)背條(tiao)(tiao)是(shi)通(tong)過皮(pi)殼機等機械用于精裝(zhuang)書(shu)(shu)(shu)(shu)本(ben)(ben)的書(shu)(shu)(shu)(shu)脊部分，使書(shu)(shu)(shu)(shu)貼連接得更加牢固。書(shu)(shu)(shu)(shu)脊制(zhi)作弧長的計算(suan)，本(ben)(ben)器規格(ge)依書(shu)(shu)(shu)(shu)芯幅面大小進行調定，以能將書(shu)(shu)(shu)(shu)芯平穩(wen)地送進夾(jia)書(shu)(shu)(shu)(shu)裝(zhuang)置內(nei)(nei)為標準。入本(ben)(ben)后的書(shu)(shu)(shu)(shu)冊不斜歪，四(si)角垂直地頂齊在夾(jia)書(shu)(shu)(shu)(shu)裝(zhuang)置的靠板、側規內(nei)(nei)。裁切(qie)尺(chi)寸正確一致，其(qi)質量要求與規格(ge)誤差與一般切(qie)書(shu)(shu)(shu)(shu)相(xiang)同(tong)。

夾(jia)書簽絲帶(dai)裝置安放(fang)在切(qie)(qie)書機(ji)與扒(ba)圓起脊(ji)機(ji)之間(jian)。即將(jiang)切(qie)(qie)完的書芯(xin)，用分本器(qi)從中(zhong)間(jian)分開(kai)，再(zai)由輸放(fang)絲帶(dai)器(qi)將(jiang)絲帶(dai)夾(jia)入(ru)中(zhong)心紙書芯(xin)的中(zhong)間(jian)靠訂縫(feng)一邊。絲帶(dai)夾(jia)在書芯(xin)內(nei)兩端(duan)各(ge)留出粘(zhan)邊和使用的余地(di)，再(zai)經切(qie)(qie)刀(dao)（剪(jian)刀(dao)式）將(jiang)其(qi)剪(jian)斷。

剪斷后(hou)的(de)絲(si)帶(dai)，裹背(bei)條芯(xin)部分被下面(mian)膠輥著(zhu)膠、壓(ya)實完成(cheng)夾(jia)書(shu)(shu)(shu)(shu)簽(qian)絲(si)帶(dai)過程。書(shu)(shu)(shu)(shu)簽(qian)絲(si)帶(dai)的(de)長(chang)度(du)與一(yi)般手工(gong)加(jia)工(gong)長(chang)度(du)基本相同，可依書(shu)(shu)(shu)(shu)冊幅面(mian)長(chang)度(du)調定。扒(ba)圓(yuan)(yuan)(yuan)起脊(ji)(ji)操作及要求。書(shu)(shu)(shu)(shu)芯(xin)經裁(cai)切(qie)、夾(jia)粘(zhan)絲(si)帶(dai)（或(huo)(huo)不夾(jia)粘(zhan)絲(si)帶(dai)）后(hou)，繼續傳送（或(huo)(huo)翻轉變(bian)位）并(bing)做90°翻轉，使(shi)平放書(shu)(shu)(shu)(shu)芯(xin)變(bian)為(wei)后(hou)背(bei)朝(chao)上（或(huo)(huo)朝(chao)下）而進入扒(ba)圓(yuan)(yuan)(yuan)起脊(ji)(ji)機(ji)。扒(ba)圓(yuan)(yuan)(yuan)起脊(ji)(ji)機(ji)的(de)加(jia)工(gong)，其操作分為(wei)兩步，但機(ji)器的(de)結構是(shi)連在(zai)(zai)一(yi)起的(de)，均是(shi)先(xian)扒(ba)圓(yuan)(yuan)(yuan)后(hou)起脊(ji)(ji)。扒(ba)圓(yuan)(yuan)(yuan)。扒(ba)圓(yuan)(yuan)(yuan)起脊(ji)(ji)機(ji)在(zai)(zai)扒(ba)圓(yuan)(yuan)(yuan)時，由一(yi)組(zu)（或(huo)(huo)一(yi)對）圓(yuan)(yuan)(yuan)輥，將書(shu)(shu)(shu)(shu)芯(xin)壓(ya)緊(jin)后(hou)作相對旋轉動(dong)作），使(shi)書(shu)(shu)(shu)(shu)背(bei)扒(ba)成(cheng)適當規格圓(yuan)(yuan)(yuan)勢，加(jia)工(gong)成(cheng)圓(yuan)(yuan)(yuan)背(bei)書(shu)(shu)(shu)(shu)芯(xin)。書(shu)(shu)(shu)(shu)芯(xin)書(shu)(shu)(shu)(shu)背(bei)的(de)形狀分為(wei)圓(yuan)(yuan)(yuan)背(bei)有脊(ji)(ji)、圓(yuan)(yuan)(yuan)背(bei)無脊(ji)(ji)和(he)方(fang)背(bei)（或(huo)(huo)稱(cheng)平背(bei)）三種。平裝裹背(bei)條書(shu)(shu)(shu)(shu)刊的(de)書(shu)(shu)(shu)(shu)脊(ji)(ji)不高出書(shu)(shu)(shu)(shu)芯(xin)平面(mian)，而精裝書(shu)(shu)(shu)(shu)刊的(de)書(shu)(shu)(shu)(shu)脊(ji)(ji)一(yi)般要高出書(shu)(shu)(shu)(shu)芯(xin)的(de)平面(mian)。書(shu)(shu)(shu)(shu)脊(ji)(ji)分為(wei)真脊(ji)(ji)和(he)假脊(ji)(ji)。

真脊是(shi)利(li)用書(shu)背上下兩邊(bian)變形(xing)的(de)弧度高出(chu)書(shu)芯(xin)平(ping)面(mian)；假脊則是(shi)利(li)用紙板鑲在書(shu)背后形(xing)成的(de)書(shu)脊，書(shu)脊的(de)脊高等(deng)于封(feng)面(mian)紙板的(de)厚(hou)度。方背書(shu)芯(xin)。是(shi)指書(shu)芯(xin)的(de)書(shu)背平(ping)直方正。書(shu)背不突出(chu)，與平(ping)裝書(shu)刊的(de)書(shu)背基本相似。

背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)上(shang)下環襯互成(cheng)直角，由(you)于(yu)精(jing)裝書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)是用(yong)(yong)(yong)鎖(suo)線訂(ding)訂(ding)連，每一(yi)個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)的(de)(de)(de)(de)訂(ding)口折縫里(li)面(mian)都(dou)用(yong)(yong)(yong)線串過，因此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)脊(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)其它部分要厚(hou)(hou)一(yi)些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍的(de)(de)(de)(de)帖(tie)數(shu)越多，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)其它部分厚(hou)(hou)度的(de)(de)(de)(de)差別也越大。所(suo)以(yi)方背(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)的(de)(de)(de)(de)形(xing)式(shi)一(yi)般只用(yong)(yong)(yong)于(yu)厚(hou)(hou)度約為20mm的(de)(de)(de)(de)精(jing)裝書(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)有(you)脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)有(you)脊(ji)又(you)稱圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)真脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)部呈圓(yuan)(yuan)(yuan)弧形(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)高起(qi)有(you)脊(ji)壟，堅(jian)硬(ying)挺實，這(zhe)種(zhong)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)的(de)(de)(de)(de)形(xing)式(shi)適合于(yu)裝訂(ding)較厚(hou)(hou)的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍，裝上(shang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼后有(you)明顯的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻閱方便(bian)。目前(qian)我(wo)國的(de)(de)(de)(de)精(jing)裝書(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍多采(cai)用(yong)(yong)(yong)這(zhe)種(zhong)圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)有(you)脊(ji)的(de)(de)(de)(de)加工形(xing)式(shi)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)無脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)無脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)又(you)稱圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)假脊(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)部呈圓(yuan)(yuan)(yuan)弧形(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)的(de)(de)(de)(de)厚(hou)(hou)度相(xiang)同，堅(jian)實挺括，但沒有(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)(bei)條脊(ji)。這(zhe)種(zhong)形(xing)式(shi)的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)，一(yi)般常與軟質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼或(huo)塑料壓制而成(cheng)的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼相(xiang)配套。中心(xin)紙有(you)些機器(qi)(qi)還沒有(you)沖(chong)圓(yuan)(yuan)(yuan)裝置，即將方背(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)先進(jin)行沖(chong)圓(yuan)(yuan)(yuan)加工，作初步定(ding)型(xing)。先根據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)厚(hou)(hou)度和中心(xin)紙幅面(mian)大小調定(ding)好夾(jia)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)(qi)及扒(ba)圓(yuan)(yuan)(yuan)輥（或(huo)沖(chong)圓(yuan)(yuan)(yuan)裝置）的(de)(de)(de)(de)規(gui)矩，再使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)進(jin)入夾(jia)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)(qi)內并送(song)到(dao)扒(ba)圓(yuan)(yuan)(yuan)輥之間(jian)，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)扒(ba)擠成(cheng)一(yi)定(ding)圓(yuan)(yuan)(yuan)勢。